From 5487cad48b779fa033fc78124128b9544db4572a Mon Sep 17 00:00:00 2001
From: Fabian-Florin Neagu <fabian.f.neagu10@gmail.com>
Date: Sat, 6 Nov 2021 12:09:46 +0200
Subject: [PATCH 1/6] Am terminat PRIMUL Code CHALLENGE

---
 .../_2_challenge/_2_foobarqix/FooBarQix.java  |   4 --
 .../src/main/java/code/_3_in_class/Main.java  |   1 +
 .../_4_student_effort/FizzBuzz/FizzBuzz.java  |  17 ++++++
 .../FooBarQix/FooBarQix.java                  |  56 ++++++++++++++++++
 .../java/code/_4_student_effort/Main.java     |  38 +++++++++++-
 .../Pair_of_2/Pair_of_2.java                  |  39 ++++++++++++
 .../Pair_of_3/Pair_of_3.java                  |  30 ++++++++++
 .../_1_study/_1_hello_world/HelloWorld.class  | Bin 0 -> 591 bytes
 .../PostfixIncrement.class                    | Bin 0 -> 1319 bytes
 .../SummingNonFloatingTypes.class             | Bin 0 -> 894 bytes
 .../ComparingIntegers.class                   | Bin 0 -> 1165 bytes
 .../_1_study/_5_slow_loops/SlowLoops.class    | Bin 0 -> 1918 bytes
 .../AccessingPrivateFields.class              | Bin 0 -> 1519 bytes
 .../_6_accessing_private_fields/Student.class | Bin 0 -> 507 bytes
 .../_2_challenge/_1_fizzbuzz/FizzBuzz.class   | Bin 0 -> 2056 bytes
 .../_1_fizzbuzz/NumberWordCorrelation.class   | Bin 0 -> 719 bytes
 .../_2_challenge/_2_foobarqix/FooBarQix.class | Bin 0 -> 1879 bytes
 .../_2_challenge/_3_pair_of_2/PairOf2.class   | Bin 0 -> 1067 bytes
 .../_2_challenge/_4_pair_of_3/PairOf3.class   | Bin 0 -> 1178 bytes
 .../main/code/_3_in_class/HelloWorld.class    | Bin 0 -> 569 bytes
 .../main/code/_3_in_class/Main.class          | Bin 0 -> 389 bytes
 .../_4_student_effort/FizzBuzz/FizzBuzz.class | Bin 0 -> 718 bytes
 .../FooBarQix/FooBarQix.class                 | Bin 0 -> 1798 bytes
 .../main/code/_4_student_effort/Main.class    | Bin 0 -> 1415 bytes
 .../Pair_of_2/Pair_of_2.class                 | Bin 0 -> 962 bytes
 .../Pair_of_3/Pair_of_3.class                 | Bin 0 -> 884 bytes
 26 files changed, 179 insertions(+), 6 deletions(-)
 create mode 100644 _1_basics/src/main/java/code/_4_student_effort/FizzBuzz/FizzBuzz.java
 create mode 100644 _1_basics/src/main/java/code/_4_student_effort/FooBarQix/FooBarQix.java
 create mode 100644 _1_basics/src/main/java/code/_4_student_effort/Pair_of_2/Pair_of_2.java
 create mode 100644 _1_basics/src/main/java/code/_4_student_effort/Pair_of_3/Pair_of_3.java
 create mode 100644 _1_basics/src/out/production/main/code/_1_study/_1_hello_world/HelloWorld.class
 create mode 100644 _1_basics/src/out/production/main/code/_1_study/_2_postfix_increment/PostfixIncrement.class
 create mode 100644 _1_basics/src/out/production/main/code/_1_study/_3_summing_non_floating/SummingNonFloatingTypes.class
 create mode 100644 _1_basics/src/out/production/main/code/_1_study/_4_comparing_integers/ComparingIntegers.class
 create mode 100644 _1_basics/src/out/production/main/code/_1_study/_5_slow_loops/SlowLoops.class
 create mode 100644 _1_basics/src/out/production/main/code/_1_study/_6_accessing_private_fields/AccessingPrivateFields.class
 create mode 100644 _1_basics/src/out/production/main/code/_1_study/_6_accessing_private_fields/Student.class
 create mode 100644 _1_basics/src/out/production/main/code/_2_challenge/_1_fizzbuzz/FizzBuzz.class
 create mode 100644 _1_basics/src/out/production/main/code/_2_challenge/_1_fizzbuzz/NumberWordCorrelation.class
 create mode 100644 _1_basics/src/out/production/main/code/_2_challenge/_2_foobarqix/FooBarQix.class
 create mode 100644 _1_basics/src/out/production/main/code/_2_challenge/_3_pair_of_2/PairOf2.class
 create mode 100644 _1_basics/src/out/production/main/code/_2_challenge/_4_pair_of_3/PairOf3.class
 create mode 100644 _1_basics/src/out/production/main/code/_3_in_class/HelloWorld.class
 create mode 100644 _1_basics/src/out/production/main/code/_3_in_class/Main.class
 create mode 100644 _1_basics/src/out/production/main/code/_4_student_effort/FizzBuzz/FizzBuzz.class
 create mode 100644 _1_basics/src/out/production/main/code/_4_student_effort/FooBarQix/FooBarQix.class
 create mode 100644 _1_basics/src/out/production/main/code/_4_student_effort/Main.class
 create mode 100644 _1_basics/src/out/production/main/code/_4_student_effort/Pair_of_2/Pair_of_2.class
 create mode 100644 _1_basics/src/out/production/main/code/_4_student_effort/Pair_of_3/Pair_of_3.class

diff --git a/_1_basics/src/main/java/code/_2_challenge/_2_foobarqix/FooBarQix.java b/_1_basics/src/main/java/code/_2_challenge/_2_foobarqix/FooBarQix.java
index 01dd73cce..cc3cb7621 100644
--- a/_1_basics/src/main/java/code/_2_challenge/_2_foobarqix/FooBarQix.java
+++ b/_1_basics/src/main/java/code/_2_challenge/_2_foobarqix/FooBarQix.java
@@ -9,13 +9,10 @@ public String compute(int i) {
 
         char[] digits = String.valueOf(i).toCharArray();
         for (char digit : digits) {
-
             if (digit == '3') s += "Foo";
             if (digit == '5') s += "Bar";
             if (digit == '7') s += "Qix";
-
         }
-
         if (s.isEmpty()) {
             s = String.valueOf(i);
         }
@@ -48,7 +45,6 @@ public String compute2(int i) {
             else if (digit == '0') s += "*";
             else if (!isDivisible) s += digit;
         }
-
         return s;
     }
 }
\ No newline at end of file
diff --git a/_1_basics/src/main/java/code/_3_in_class/Main.java b/_1_basics/src/main/java/code/_3_in_class/Main.java
index 3b87b4563..44a0865ff 100644
--- a/_1_basics/src/main/java/code/_3_in_class/Main.java
+++ b/_1_basics/src/main/java/code/_3_in_class/Main.java
@@ -4,5 +4,6 @@ public class Main {
 
     public static void main(String[] args) {
         //TODO put your code changes in here
+        //jskdfjk
     }
 }
\ No newline at end of file
diff --git a/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz/FizzBuzz.java b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz/FizzBuzz.java
new file mode 100644
index 000000000..d396e7267
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz/FizzBuzz.java
@@ -0,0 +1,17 @@
+package code._4_student_effort.FizzBuzz;
+
+public class FizzBuzz
+{
+        public void FizzBuzz(int n)
+        {
+            for(int i=0;i<n;i++)
+            {
+                if(i%3==0) System.out.print("Fizz");
+                if(i%5==0) System.out.print("Buzz");
+                if(i%3!=0&&i%5!=0)
+                    System.out.print(i);
+                System.out.print(" , ");
+            }
+        }
+
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/FooBarQix/FooBarQix.java b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix/FooBarQix.java
new file mode 100644
index 000000000..b6f072ad7
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix/FooBarQix.java
@@ -0,0 +1,56 @@
+package code._4_student_effort.FooBarQix;
+
+public class FooBarQix
+{
+    public String compute(int n)
+    {
+        String s="";
+        int nr1;
+        int nr2;
+
+        nr1=se_divide(n,3);
+        for(int i=0;i<nr1;i++)
+            s=s+"FOO";
+        nr2=se_gaseste(n,3);
+        for(int i=0;i<nr2;i++)
+            s=s+"FOO";
+
+        nr1=se_divide(n,5);
+        for(int i=0;i<nr1;i++)
+            s=s+"BAR";
+        nr2=se_gaseste(n,5);
+        for(int i=0;i<nr2;i++)
+            s=s+"BAR";
+
+        nr1=se_divide(n,7);
+        for(int i=0;i<nr1;i++)
+            s=s+"QIX";
+        nr2=se_gaseste(n,7);
+        for(int i=0;i<nr2;i++)
+            s=s+"QIX";
+
+        return s;
+    }
+    public int se_divide(int n,int a)
+    {
+        int nr=0;
+        while(n!=0)
+        {
+            if(n%a==0)
+                nr++;
+            n=n/10;
+        }
+        return nr;
+    }
+    public int se_gaseste(int n,int a)
+    {
+        int nr=0;
+        while(n!=0)
+        {
+            if(n%10==a)
+                nr++;
+            n=n/10;
+        }
+        return  nr;
+    }
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/Main.java b/_1_basics/src/main/java/code/_4_student_effort/Main.java
index 95bb1182c..51ffee988 100644
--- a/_1_basics/src/main/java/code/_4_student_effort/Main.java
+++ b/_1_basics/src/main/java/code/_4_student_effort/Main.java
@@ -1,8 +1,42 @@
 package code._4_student_effort;
 
+import code._4_student_effort.FizzBuzz.FizzBuzz;
+import code._4_student_effort.FooBarQix.FooBarQix;
+import code._4_student_effort.Pair_of_2.Pair_of_2;
+import code._4_student_effort.Pair_of_3.Pair_of_3;
+
 public class Main {
 
-    public static void main(String[] args) {
-        //TODO put your code changes in here
+    public static void main(String[] args)
+    {
+        // Challenge 1 - verificare
+        /*FizzBuzz obiect=new FizzBuzz();
+        obiect.FizzBuzz(40);*/
+
+        //Challenge 2 - verificare
+        FooBarQix object2=new FooBarQix();
+        for(int i=0;i<=15;i++)
+        {
+            String rez;
+            rez=object2.compute(i);
+            if(rez.equals(""))
+                System.out.print(i+" , ");
+            else
+                System.out.print(rez+ " , ");
+        }
+
+        //Chalenge 3 - verficare
+    /*    Pair_of_2 a=new Pair_of_2();
+        int []v={1,2,3,2,-1,-2,-2,-2,-3};
+        int nr=0;
+        nr=a.nr_of_pairs(v);
+        System.out.println("Nr de pereschi este de "+ nr);*/
+
+        //Cjallenge 4 - Verificare
+       /* Pair_of_3 p=new Pair_of_3();
+        int []v={-1,-1,-1,2};
+        int nr1=0;
+        nr1=p.nr_of_pairs(v);
+        System.out.println("Nr de pereschi este de "+ nr1);*/
     }
 }
diff --git a/_1_basics/src/main/java/code/_4_student_effort/Pair_of_2/Pair_of_2.java b/_1_basics/src/main/java/code/_4_student_effort/Pair_of_2/Pair_of_2.java
new file mode 100644
index 000000000..326f9dd77
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/Pair_of_2/Pair_of_2.java
@@ -0,0 +1,39 @@
+package code._4_student_effort.Pair_of_2;
+
+public class Pair_of_2 {
+    public int nr_of_pairs(int[] v)
+    {
+        int[] aux = new int[v.length];
+        boolean exista1;
+        boolean exista2;
+        int nr = 0;
+        int index = 0;
+        for (int i = 0; i < v.length - 1; i++)
+        {
+            exista1 = false;
+            for (int k = 0; k < aux.length; k++) {
+                if (i == aux[k])
+                    exista1 = true;
+            }
+            if (exista1 == false)
+                for (int j = i + 1; j < v.length; j++)
+                {
+                    exista2=false;
+                    for (int k = 0; k < aux.length; k++)
+                        if (j == aux[k])
+                            exista2 = true;
+                    if(exista2==false)
+                    {
+                        if (v[i]+v[j]==0)
+                        {
+                            nr++;
+                            aux[index] = i;
+                            aux[index + 1] = j;
+                            index = index + 2;
+                        }
+                    }
+                 }
+        }
+        return nr;
+    }
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/Pair_of_3/Pair_of_3.java b/_1_basics/src/main/java/code/_4_student_effort/Pair_of_3/Pair_of_3.java
new file mode 100644
index 000000000..7edb1d40e
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/Pair_of_3/Pair_of_3.java
@@ -0,0 +1,30 @@
+package code._4_student_effort.Pair_of_3;
+
+public class Pair_of_3
+{
+    public int nr_of_pairs(int [] v)
+    {
+        int nr=0;
+        int index=0;
+        int [] aux=new int[v.length];
+        for(int i=0;i<v.length-2;i++)
+            for(int j=i+1;j<v.length-1;j++)
+                for(int k=j+1;k<v.length;k++)
+                {
+                    boolean exista=false;
+                    for(int l=0;l<aux.length;l++)
+                        if(i==aux[l]||j==aux[l]||k==aux[l])
+                            exista=true;
+                    if(exista==false&&(v[i]+v[j]+v[k]==0))
+                    {
+                        nr++;
+                        aux[index]=i;
+                        aux[index+1]=j;
+                        aux[index+2]=k;
+                        index=index+3;
+                        break;
+                    }
+                }
+        return nr;
+    }
+}
diff --git a/_1_basics/src/out/production/main/code/_1_study/_1_hello_world/HelloWorld.class b/_1_basics/src/out/production/main/code/_1_study/_1_hello_world/HelloWorld.class
new file mode 100644
index 0000000000000000000000000000000000000000..cb84442035440041b44e08fc0c361ab4d304acd7
GIT binary patch
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diff --git a/_1_basics/src/out/production/main/code/_1_study/_2_postfix_increment/PostfixIncrement.class b/_1_basics/src/out/production/main/code/_1_study/_2_postfix_increment/PostfixIncrement.class
new file mode 100644
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GIT binary patch
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diff --git a/_1_basics/src/out/production/main/code/_1_study/_3_summing_non_floating/SummingNonFloatingTypes.class b/_1_basics/src/out/production/main/code/_1_study/_3_summing_non_floating/SummingNonFloatingTypes.class
new file mode 100644
index 0000000000000000000000000000000000000000..4dea94693b44fe307f23efaccbf9fd41af435dd4
GIT binary patch
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diff --git a/_1_basics/src/out/production/main/code/_1_study/_4_comparing_integers/ComparingIntegers.class b/_1_basics/src/out/production/main/code/_1_study/_4_comparing_integers/ComparingIntegers.class
new file mode 100644
index 0000000000000000000000000000000000000000..db0ecf7c233dcafab81ddab8bdbe2eb162841dd3
GIT binary patch
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diff --git a/_1_basics/src/out/production/main/code/_1_study/_5_slow_loops/SlowLoops.class b/_1_basics/src/out/production/main/code/_1_study/_5_slow_loops/SlowLoops.class
new file mode 100644
index 0000000000000000000000000000000000000000..87d7498b3460bd1f9eabf48eef12f0be4af3d051
GIT binary patch
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new file mode 100644
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From 152ced4b7f162c1aad372f555443a2a34bc9b978 Mon Sep 17 00:00:00 2001
From: Fabian-Florin Neagu <fabian.f.neagu10@gmail.com>
Date: Sat, 6 Nov 2021 23:36:13 +0200
Subject: [PATCH 2/6] Am terminat si Challenge-ul de la Cursul 2 - OO

---
 .../_2_movie_database/Studio.java             |   4 +-
 .../java/code/_4_student_effort/Main.java     |  76 +++++++++++++++++-
 .../_1_two_fighters/BoxingMatch.java          |  31 +++++++
 .../_1_two_fighters/Fighter.java              |  53 ++++++++++++
 .../_2_movie_database/Actor.java              |  37 +++++++++
 .../_2_movie_database/Film.java               |  37 +++++++++
 .../_2_movie_database/Premiu.java             |  24 ++++++
 .../_2_movie_database/Studio.java             |  37 +++++++++
 .../_3_animal_hierarchy/Animal.java           |  21 +++++
 .../_3_animal_hierarchy/Cat.java              |  32 ++++++++
 .../_3_animal_hierarchy/Fish.java             |  36 +++++++++
 .../_3_animal_hierarchy/Pet.java              |   8 ++
 .../_3_animal_hierarchy/Spider.java           |  17 ++++
 .../_3_animal_hierarchy/TestAnimals.java      |  13 +++
 .../_1_initialization_order/Child.class       | Bin 0 -> 665 bytes
 .../InitializationOrder.class                 | Bin 0 -> 604 bytes
 .../_1_initialization_order/Parent.class      | Bin 0 -> 638 bytes
 .../_2_covariant_return/CovariantReturn.class | Bin 0 -> 786 bytes
 .../_3_class_types/ClassTypes$1.class         | Bin 0 -> 842 bytes
 .../ClassTypes$1LocalClass.class              | Bin 0 -> 615 bytes
 .../ClassTypes$AbstractClass.class            | Bin 0 -> 603 bytes
 .../ClassTypes$ConcreteInnerClass.class       | Bin 0 -> 906 bytes
 .../ClassTypes$InnerClass.class               | Bin 0 -> 576 bytes
 .../ClassTypes$NestedClass.class              | Bin 0 -> 446 bytes
 .../_1_study/_3_class_types/ClassTypes.class  | Bin 0 -> 1213 bytes
 .../SomeRandomInterface$NestedClass.class     | Bin 0 -> 473 bytes
 .../_3_class_types/SomeRandomInterface.class  | Bin 0 -> 274 bytes
 .../_4_shadowing/Shadowing$FirstLevel.class   | Bin 0 -> 1358 bytes
 .../_1_study/_4_shadowing/Shadowing.class     | Bin 0 -> 904 bytes
 ...DefaultAndPrivateMethodsInInterfaces.class | Bin 0 -> 614 bytes
 .../_5_default_methods/DefaultMethods.class   | Bin 0 -> 787 bytes
 .../_1_study/_6_multiple_inheritance/I1.class | Bin 0 -> 540 bytes
 .../_1_study/_6_multiple_inheritance/I2.class | Bin 0 -> 540 bytes
 .../MultipleInheritance.class                 | Bin 0 -> 772 bytes
 .../_1_two_fighters/BoxingMatch.class         | Bin 0 -> 1389 bytes
 .../_1_two_fighters/Fighter.class             | Bin 0 -> 667 bytes
 .../_2_movie_database/Actor.class             | Bin 0 -> 631 bytes
 .../_2_challenge/_2_movie_database/Film.class | Bin 0 -> 630 bytes
 .../_2_movie_database/Premiu.class            | Bin 0 -> 491 bytes
 .../_3_animal_hierarchy/Animal.class          | Bin 0 -> 1064 bytes
 .../_3_animal_hierarchy/Cat.class             | Bin 0 -> 1517 bytes
 .../_3_animal_hierarchy/Fish.class            | Bin 0 -> 1051 bytes
 .../_3_animal_hierarchy/Pet.class             | Bin 0 -> 229 bytes
 .../_3_animal_hierarchy/Spider.class          | Bin 0 -> 587 bytes
 .../_3_animal_hierarchy/TestAnimals.class     | Bin 0 -> 980 bytes
 .../_2_oo/code/_3_in_class/Main.class         | Bin 0 -> 389 bytes
 .../_2_oo/code/_4_student_effort/Main.class   | Bin 0 -> 4649 bytes
 .../_1_two_fighters/BoxingMatch.class         | Bin 0 -> 1091 bytes
 .../_1_two_fighters/Fighter.class             | Bin 0 -> 1388 bytes
 .../_2_movie_database/Actor.class             | Bin 0 -> 1736 bytes
 .../_2_movie_database/Film.class              | Bin 0 -> 1781 bytes
 .../_2_movie_database/Premiu.class            | Bin 0 -> 1253 bytes
 .../_2_movie_database/Studio.class            | Bin 0 -> 1699 bytes
 .../_3_animal_hierarchy/Animal.class          | Bin 0 -> 1164 bytes
 .../_3_animal_hierarchy/Cat.class             | Bin 0 -> 1089 bytes
 .../_3_animal_hierarchy/Fish.class            | Bin 0 -> 1181 bytes
 .../_3_animal_hierarchy/Pet.class             | Bin 0 -> 234 bytes
 .../_3_animal_hierarchy/Spider.class          | Bin 0 -> 694 bytes
 .../_3_animal_hierarchy/TestAnimals.class     | Bin 0 -> 1022 bytes
 59 files changed, 422 insertions(+), 4 deletions(-)
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/BoxingMatch.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/Fighter.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Actor.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Film.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Premiu.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Studio.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Animal.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Cat.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Fish.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Pet.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Spider.java
 create mode 100644 _2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/Child.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/InitializationOrder.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/Parent.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_2_covariant_return/CovariantReturn.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$1.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$1LocalClass.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$AbstractClass.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$ConcreteInnerClass.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$InnerClass.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$NestedClass.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/SomeRandomInterface$NestedClass.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/SomeRandomInterface.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_4_shadowing/Shadowing$FirstLevel.class
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 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_6_multiple_inheritance/I1.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_6_multiple_inheritance/I2.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_1_study/_6_multiple_inheritance/MultipleInheritance.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_1_two_fighters/BoxingMatch.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_1_two_fighters/Fighter.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_2_movie_database/Actor.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_2_movie_database/Film.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_2_movie_database/Premiu.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_3_animal_hierarchy/Animal.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_3_animal_hierarchy/Cat.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_3_animal_hierarchy/Fish.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_3_animal_hierarchy/Pet.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_3_animal_hierarchy/Spider.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_2_challenge/_3_animal_hierarchy/TestAnimals.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_3_in_class/Main.class
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 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_1_two_fighters/BoxingMatch.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_1_two_fighters/Fighter.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_2_movie_database/Actor.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_2_movie_database/Film.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_2_movie_database/Premiu.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_2_movie_database/Studio.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/Animal.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/Cat.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/Fish.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/Pet.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/Spider.class
 create mode 100644 _2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.class

diff --git a/_2_oo/src/main/java/code/_2_challenge/_2_movie_database/Studio.java b/_2_oo/src/main/java/code/_2_challenge/_2_movie_database/Studio.java
index 5cfc00e0d..f0794ba68 100644
--- a/_2_oo/src/main/java/code/_2_challenge/_2_movie_database/Studio.java
+++ b/_2_oo/src/main/java/code/_2_challenge/_2_movie_database/Studio.java
@@ -4,8 +4,8 @@ public class Studio {
     public String nume;
     public Film[] filme;
 
-    public Studio(String nume, Film[] filme) {
+    public Studio(String nume, Film[] filme)
+    {
         this.nume = nume;
         this.filme = filme;
     }
-}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/Main.java b/_2_oo/src/main/java/code/_4_student_effort/Main.java
index 95bb1182c..7a57cb695 100644
--- a/_2_oo/src/main/java/code/_4_student_effort/Main.java
+++ b/_2_oo/src/main/java/code/_4_student_effort/Main.java
@@ -1,8 +1,80 @@
 package code._4_student_effort;
 
+import code._4_student_effort._2_movie_database.Actor;
+import code._4_student_effort._2_movie_database.Film;
+import code._4_student_effort._2_movie_database.Studio;
+import code._4_student_effort._2_movie_database.Premiu;
+import code._4_student_effort._1_two_fighters.BoxingMatch;
+import code._4_student_effort._1_two_fighters.Fighter;
+
 public class Main {
 
-    public static void main(String[] args) {
-        //TODO put your code changes in here
+    public static void main(String[] args)
+    {
+        Fighter f1=new Fighter("Fabian",100,30);
+        Fighter f2=new Fighter("Andra",70,20);
+        BoxingMatch match1=new BoxingMatch(f1,f2);
+        BoxingMatch matche2=new BoxingMatch();
+        String winner=match1.fight();
+        System.out.println("Castigatorul meciului este "+ winner);
+
+        Premiu oscar1990 = new Premiu("oscar", 1990);
+        Premiu oscar2000 = new Premiu("oscar", 2000);
+        Premiu oscar2010 = new Premiu("oscar", 2010);
+        Premiu oscar2018 = new Premiu("oscar", 2018);
+        Premiu p=new Premiu();
+
+        Actor actorOscar1990 = new Actor("actor cu 2 oscaruri", 35, new Premiu[]{oscar1990,oscar2000});
+        Actor actorOscar2010 = new Actor("actor cu oscar din 2000", 55,new Premiu []{oscar2000,oscar1990});
+        Actor actorOscar2018 = new Actor("actor cu oscar din 2018", 23, new Premiu[]{oscar2018,oscar2010,oscar2000});
+        Actor actorFaraPremii01 = new Actor("actor fara oscar 01", 33, new Premiu[]{oscar2000,oscar1990});
+        Actor actorFaraPremii02 = new Actor("actor fara oscar 02", 60, new Premiu[]{});
+        Actor actorFaraPremii03 = new Actor("actor fara oscar 02", 20, new Premiu[]{});
+
+        Film film1 = new Film("a", 12, new Actor[]{actorOscar1990, actorFaraPremii01});
+        Film film2 = new Film("d", 23, new Actor[]{actorFaraPremii01, actorFaraPremii02, actorFaraPremii03});
+        Film film3 = new Film("d", 44, new Actor[]{actorFaraPremii01, actorFaraPremii02, actorFaraPremii03});
+        Film film4 = new Film("c", 55, new Actor[]{actorOscar2010, actorOscar2018, actorFaraPremii02});
+        Film film5 = new Film("s", 66, new Actor[]{actorFaraPremii02, actorFaraPremii03});
+
+        Studio studio1 = new Studio("MGM", new Film[]{film1, film2});
+        Studio studio2 = new Studio("Disney", new Film[]{film3, film4, film5});
+
+        Studio[] studioDatabase = new Studio[]{studio1, studio2};
+        //studio1.afisare();
+        //studio_with_Moreth2_movies(studioDatabase);
+        ex_2(studioDatabase);
+        ex_3(studioDatabase);
+    }
+    public static void studio_with_Moreth2_movies(Studio [] v)
+    {
+        for(int i=0;i<v.length;i++)
+            if(v[i].getFilme().length>=2)
+                System.out.println(v[i].getNume());
+    }
+    public static void ex_2(Studio [] v)
+    {
+        for(int i=0;i<v.length;i++)
+            for(int j=0;j<v[i].getFilme().length;j++)
+                for(int k=0;k<v[i].getFilme()[j].getActori().length;k++)
+                    if(v[i].getFilme()[j].getActori()[k].getNume().equals("actor cu 2 oscaruri"))
+                        System.out.println(v[i].getNume());
+
+    }
+    public static void ex_3(Studio [] v)
+    {
+        for(int i=0;i<v.length;i++)
+            for(int j=0;j<v[i].getFilme().length;j++)
+            {
+                boolean exista = false;
+                for (int k = 0; k < v[i].getFilme()[j].getActori().length; k++)
+                {
+                    if (v[i].getFilme()[j].getActori()[k].getVarsta()> 50)
+                        exista = true;
+                    if (exista)
+                    {System.out.println(v[i].getFilme()[j].getNume());
+                    break;}
+                }
+            }
     }
 }
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/BoxingMatch.java b/_2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/BoxingMatch.java
new file mode 100644
index 000000000..f174a14a5
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/BoxingMatch.java
@@ -0,0 +1,31 @@
+package code._4_student_effort._1_two_fighters;
+
+public class BoxingMatch
+{
+    protected Fighter f1,f2;
+
+    public BoxingMatch(Fighter f1,Fighter f2)
+    {
+        this.f1=f1;
+        this.f2=f2;
+    }
+
+    public BoxingMatch()
+    {
+        f1=new Fighter();
+        f2=new Fighter();
+    }
+    public String fight()
+    {
+        while(f1.health!=0&&f2.health!=0)
+        {
+            f1.attack(f2);
+            if(f2.health==0)
+                return f1.name;
+            f2.attack(f1);
+            if(f1.health==0)
+                return f2.name;
+        }
+        return f1.name;
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/Fighter.java b/_2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/Fighter.java
new file mode 100644
index 000000000..4ad6b31a7
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_1_two_fighters/Fighter.java
@@ -0,0 +1,53 @@
+package code._4_student_effort._1_two_fighters;
+
+public class Fighter
+{
+    protected String name;
+    protected int health;
+    protected int damagePerAttack;
+
+    public Fighter()
+    {
+        super();
+        name="";
+        damagePerAttack=0;
+        health=0;
+    }
+    public Fighter(String n,int h, int d)
+    {
+        name=n;
+        health=h;
+        damagePerAttack=d;
+    }
+
+    public void setName(String n)
+    {
+        name=n;
+    }
+    public void setHealth(int h)
+    {
+        health=h;
+    }
+    public void setDamagePerAttack(int d)
+    {
+        damagePerAttack=d;
+    }
+    public String getName()
+    {
+        return name;
+    }
+    public int getDamagePerAttack()
+    {
+        return damagePerAttack;
+    }
+    public int getHealth()
+    {
+        return health;
+    }
+    public void attack(Fighter f)
+    {
+        f.health=f.health-this.damagePerAttack;
+        if(f.health<0)
+            f.health=0;
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Actor.java b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Actor.java
new file mode 100644
index 000000000..763ea1c10
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Actor.java
@@ -0,0 +1,37 @@
+package code._4_student_effort._2_movie_database;
+
+public class Actor
+{
+    protected String nume;
+    protected int varsta;
+    protected Premiu [] premii;
+
+    public Actor()
+    {
+        nume="";
+        varsta=0;
+        premii=null;
+    }
+    public Actor(String s,int v,Premiu [] p)
+    {
+        nume=s;
+        varsta=v;
+       premii=p;
+    }
+    public String getNume()
+    {
+        return nume;
+    }
+    public int getVarsta()
+    {
+        return varsta;
+    }
+    public void afisare()
+    {
+        System.out.println("Actor: Nume"+nume+" / Varsta:"+varsta);
+        for(int i=0;i< premii.length;i++)
+        {
+            premii[i].afisare();
+        }
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Film.java b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Film.java
new file mode 100644
index 000000000..9e3814ad3
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Film.java
@@ -0,0 +1,37 @@
+package code._4_student_effort._2_movie_database;
+
+public class Film
+{
+    protected String nume;
+    protected int anAparitie;
+    protected Actor [] actori;
+
+    public Film()
+    {
+        nume="";
+        anAparitie=0;
+        actori=null;
+    }
+    public Film(String n,int an,Actor [] a)
+    {
+        nume=n;
+        anAparitie=an;
+        actori=a;
+    }
+    public Actor[] getActori()
+    {
+        return actori;
+    }
+    public String getNume()
+    {
+        return nume;
+    }
+    public void afisare()
+    {
+        System.out.println("Film: Nume: "+nume+" / An: "+anAparitie);
+        for(int i=0;i<actori.length;i++)
+        {
+            actori[i].afisare();
+        }
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Premiu.java b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Premiu.java
new file mode 100644
index 000000000..3dae76150
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Premiu.java
@@ -0,0 +1,24 @@
+package code._4_student_effort._2_movie_database;
+
+public class Premiu
+{
+    protected String nume;
+    protected int an;
+
+    public Premiu()
+    {
+        nume="";
+        an=0;
+    }
+    public Premiu(String n, int a)
+    {
+        nume=n;
+        an=a;
+    }
+    public void afisare()
+    {
+        System.out.println("Premiu: Nume: "+nume+" / An:"+an);
+    }
+
+}
+
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Studio.java b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Studio.java
new file mode 100644
index 000000000..810642781
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_2_movie_database/Studio.java
@@ -0,0 +1,37 @@
+package code._4_student_effort._2_movie_database;
+
+public class Studio
+{
+    protected String nume;
+    protected Film [] filme;
+
+    public Studio()
+    {
+        nume="";
+        filme=null;
+    }
+
+    public Studio(String n,Film [] f)
+    {
+        nume=n;
+        filme=f;
+    }
+
+    public void afisare()
+    {
+        System.out.println("Studio: "+nume);
+        for(int i=0;i< filme.length;i++)
+        {
+            filme[i].afisare();
+        }
+    }
+    public Film[] getFilme()
+    {
+         return filme;
+    }
+
+    public String getNume()
+    {
+        return nume;
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Animal.java b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Animal.java
new file mode 100644
index 000000000..4d883cf34
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Animal.java
@@ -0,0 +1,21 @@
+package code._4_student_effort._3_animal_hierarchy;
+
+public abstract class Animal
+{
+    protected int legs;
+
+
+    protected Animal()
+    {
+        legs=0;
+    }
+    protected Animal(int l)
+    {
+        legs=l;
+    }
+    public abstract void eat();
+    public void walk()
+    {
+        System.out.println("Animalul merge folosind nr de picioare: "+legs);
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Cat.java b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Cat.java
new file mode 100644
index 000000000..f135e90ea
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Cat.java
@@ -0,0 +1,32 @@
+package code._4_student_effort._3_animal_hierarchy;
+
+public class Cat extends Animal implements Pet
+{
+    protected String name;
+
+    public Cat()
+    {
+        this("");
+    }
+    public Cat(String nume)
+    {
+        super(4);
+        name=nume;
+    }
+    public void eat()
+    {
+        System.out.println("Pisica mananca soareci!");
+    }
+    public String getName()
+    {
+        return name;
+    }
+    public void setName(String name)
+    {
+        this.name=name;
+    }
+    public void play()
+    {
+        System.out.println("Se joaca cu mingea");
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Fish.java b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Fish.java
new file mode 100644
index 000000000..a6bf8cc87
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Fish.java
@@ -0,0 +1,36 @@
+package code._4_student_effort._3_animal_hierarchy;
+
+public class Fish extends Animal implements Pet
+{
+    protected String name;
+
+    public Fish(String name)
+    {
+        super(0);
+        this.name=name;
+    }
+    public Fish()
+    {
+        this("");
+    }
+    public void eat()
+    {
+        System.out.println("Mananca aleg");
+    }
+    public void walk()
+    {
+        System.out.println("Nu mereg, doar inoata");
+    }
+    public void setName(String name)
+    {
+        this.name=name;
+    }
+    public String getName()
+    {
+        return name;
+    }
+    public void play()
+    {
+        System.out.println("Se joaca in apa singur");
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Pet.java b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Pet.java
new file mode 100644
index 000000000..35702edbb
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Pet.java
@@ -0,0 +1,8 @@
+package code._4_student_effort._3_animal_hierarchy;
+
+public interface Pet
+{
+    abstract public String getName();
+    abstract public void setName(String name);
+    abstract void play();
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Spider.java b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Spider.java
new file mode 100644
index 000000000..f5f52db06
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/Spider.java
@@ -0,0 +1,17 @@
+package code._4_student_effort._3_animal_hierarchy;
+
+public class Spider extends Animal
+{
+    public Spider()
+    {
+        super(8);
+    }
+    public Spider(int l)
+    {
+        super(l);
+    }
+    public void eat()
+    {
+        System.out.println("Mananca numai musculite");
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java
new file mode 100644
index 000000000..a3768c391
--- /dev/null
+++ b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java
@@ -0,0 +1,13 @@
+package code._4_student_effort._3_animal_hierarchy;
+
+public class TestAnimals
+{
+    public static void main(String[] args)
+    {
+        Fish d=new Fish();
+        Cat c=new Cat("Ana");
+        Animal a=new Fish();
+        Animal e=new Spider();
+        Pet p=new Cat();
+    }
+}
diff --git a/_2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/Child.class b/_2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/Child.class
new file mode 100644
index 0000000000000000000000000000000000000000..09b986806f8b5a453cc21f2b8741e4f18f8f5a28
GIT binary patch
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diff --git a/_2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/InitializationOrder.class b/_2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/InitializationOrder.class
new file mode 100644
index 0000000000000000000000000000000000000000..6975f2d63db86a4a54a40829509ad34f7932f3c8
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/_2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/Parent.class b/_2_oo/src/out/production/_2_oo/code/_1_study/_1_initialization_order/Parent.class
new file mode 100644
index 0000000000000000000000000000000000000000..5c7c2b7fa7c4da034360081766a356043c6be8da
GIT binary patch
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diff --git a/_2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$1.class b/_2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$1.class
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diff --git a/_2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$1LocalClass.class b/_2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$1LocalClass.class
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index 0000000000000000000000000000000000000000..4ffe9a26e5306a94e860abf8335de48b66a072ed
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diff --git a/_2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$AbstractClass.class b/_2_oo/src/out/production/_2_oo/code/_1_study/_3_class_types/ClassTypes$AbstractClass.class
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GIT binary patch
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diff --git a/_2_oo/src/out/production/_2_oo/code/_4_student_effort/_2_movie_database/Studio.class b/_2_oo/src/out/production/_2_oo/code/_4_student_effort/_2_movie_database/Studio.class
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new file mode 100644
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diff --git a/_2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/Pet.class b/_2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/Pet.class
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new file mode 100644
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From 011f8bb50f74ccc44bf85d6529614b680ac04ee2 Mon Sep 17 00:00:00 2001
From: Fabian-Florin Neagu <fabian.f.neagu10@gmail.com>
Date: Sun, 28 Nov 2021 16:34:16 +0200
Subject: [PATCH 3/6] Proiect 1 realizat

---
 .../out/production/Proiect_java_1/Main.class  | Bin 0 -> 1253 bytes
 .../Proiect_java_1/Package1/Employee.class    | Bin 0 -> 1158 bytes
 .../Package1/EmployeeFactory.class            | Bin 0 -> 1500 bytes
 .../Package1/HumanAbstractFactory.class       | Bin 0 -> 242 bytes
 .../Package1/HumanFactory.class               | Bin 0 -> 746 bytes
 .../Proiect_java_1/Package1/Intern.class      | Bin 0 -> 1133 bytes
 .../Package1/InternFactory.class              | Bin 0 -> 1507 bytes
 .../Package1/ObservedSubject.class            | Bin 0 -> 226 bytes
 .../Proiect_java_1/Package1/Observer.class    | Bin 0 -> 192 bytes
 .../Proiect_java_1/Package1/Supervisor.class  | Bin 0 -> 1644 bytes
 .../Package1/SupervisorFactory.class          | Bin 0 -> 1326 bytes
 Proiect_java_1/src/Main.java                  |  16 ++++++
 Proiect_java_1/src/Package1/Employee.java     |  33 +++++++++++
 .../src/Package1/EmployeeFactory.java         |  28 ++++++++++
 .../src/Package1/HumanAbstractFactory.java    |   7 +++
 Proiect_java_1/src/Package1/HumanFactory.java |  13 +++++
 Proiect_java_1/src/Package1/Intern.java       |  33 +++++++++++
 .../src/Package1/InternFactory.java           |  28 ++++++++++
 .../src/Package1/ObservedSubject.java         |   7 +++
 Proiect_java_1/src/Package1/Observer.java     |   7 +++
 Proiect_java_1/src/Package1/Supervisor.java   |  50 +++++++++++++++++
 .../src/Package1/SupervisorFactory.java       |  24 ++++++++
 .../_3_animal_hierarchy/TestAnimals.java      |   1 +
 .../_3_animal_hierarchy/TestAnimals.class     | Bin 1022 -> 1160 bytes
 .../TemplateMethodBubleSort.java              |   3 +-
 .../java/code/_4_student_effort/Main.java     |  14 ++++-
 .../_1_iterator/ArrayCustomIterator.java      |  26 +++++++++
 .../_2_strategy/BubleSort.java                |  17 ++++++
 .../_2_strategy/MergeSort.java                |  39 +++++++++++++
 .../_2_strategy/SortingStrategy.java          |   6 ++
 .../_2_strategy/StrategyExample.java          |  21 +++++++
 .../_4_student_effort/_3_proxy/Apartment.java |  21 +++++++
 .../_3_proxy/RealEstateAgentProxy.java        |  25 +++++++++
 .../_4_student_effort/_3_proxy/Student.java   |  26 +++++++++
 .../_4_observer/ObservedSubject.java          |   8 +++
 .../_4_observer/Observer.java                 |   6 ++
 .../_4_observer/Student.java                  |  23 ++++++++
 .../_4_observer/Teacher.java                  |  31 +++++++++++
 .../_4_observer/TeachingClassExample.java     |  24 ++++++++
 .../_5_template_method/AscBubbleSort.java     |  11 ++++
 .../_5_template_method/DescBubbleSort.java    |  11 ++++
 .../TemplateMethodBubbleSort.java             |  18 ++++++
 .../TemplateMethodExample.java                |  26 +++++++++
 .../_4_student_effort/_6_Builder/Example.java |  14 +++++
 .../_4_student_effort/_6_Builder/Person.java  |  52 ++++++++++++++++++
 ...ignPatternsUsedInJavaApis$Behavioral.class | Bin 0 -> 470 bytes
 ...ignPatternsUsedInJavaApis$Creational.class | Bin 0 -> 470 bytes
 ...ignPatternsUsedInJavaApis$Structural.class | Bin 0 -> 470 bytes
 .../DesignPatternsUsedInJavaApis.class        | Bin 0 -> 628 bytes
 .../_1_iterator/ArrayCustomIterator.class     | Bin 0 -> 1020 bytes
 .../_2_challenge/_2_strategy/BubleSort.class  | Bin 0 -> 767 bytes
 .../_2_challenge/_2_strategy/MergeSort.class  | Bin 0 -> 1253 bytes
 .../_2_strategy/SortingStrategy.class         | Bin 0 -> 182 bytes
 .../_2_strategy/StrategyExample.class         | Bin 0 -> 1958 bytes
 .../_2_challenge/_3_proxy/Apartment.class     | Bin 0 -> 1219 bytes
 .../_2_challenge/_3_proxy/ProxyExample.class  | Bin 0 -> 2064 bytes
 .../_3_proxy/RealEstateAgentProxy.class       | Bin 0 -> 1506 bytes
 .../code/_2_challenge/_3_proxy/Student.class  | Bin 0 -> 1169 bytes
 .../_4_observer/ObservedSubject.class         | Bin 0 -> 277 bytes
 .../_2_challenge/_4_observer/Observer.class   | Bin 0 -> 168 bytes
 .../_2_challenge/_4_observer/Student.class    | Bin 0 -> 1441 bytes
 .../_2_challenge/_4_observer/Teacher.class    | Bin 0 -> 1547 bytes
 .../_4_observer/TeachingClassExample.class    | Bin 0 -> 1174 bytes
 .../_5_template_method/AscBubleSort.class     | Bin 0 -> 649 bytes
 .../_5_template_method/DescBubleSort.class    | Bin 0 -> 652 bytes
 .../TemplateMethodBubleSort.class             | Bin 0 -> 787 bytes
 .../TemplateMethodExample.class               | Bin 0 -> 1984 bytes
 .../_6_builder/BuilderExample.class           | Bin 0 -> 1104 bytes
 .../_6_builder/Person$Builder.class           | Bin 0 -> 1238 bytes
 .../code/_2_challenge/_6_builder/Person.class | Bin 0 -> 793 bytes
 .../hard/_1_decorations/ChristmasTree.class   | Bin 0 -> 1964 bytes
 .../hard/_1_decorations/DecorableTree.class   | Bin 0 -> 287 bytes
 .../hard/_1_decorations/Decoration.class      | Bin 0 -> 2148 bytes
 .../hard/_1_decorations/DecorationBulb.class  | Bin 0 -> 653 bytes
 .../hard/_1_decorations/DecorationCandy.class | Bin 0 -> 656 bytes
 .../_1_decorations/DecorationGarland.class    | Bin 0 -> 662 bytes
 .../TreeDecorationsExample.class              | Bin 0 -> 1072 bytes
 .../hard/_2_dringking_time/IPerson.class      | Bin 0 -> 316 bytes
 .../_2_dringking_time/LogExecutionTime.class  | Bin 0 -> 426 bytes
 .../MeasureDringkingTime.class                | Bin 0 -> 1029 bytes
 .../_2_dringking_time/Person$Builder.class    | Bin 0 -> 1488 bytes
 .../hard/_2_dringking_time/Person.class       | Bin 0 -> 1716 bytes
 .../PersonInvocationHandler.class             | Bin 0 -> 2649 bytes
 .../main/code/_3_in_class/Main.class          | Bin 0 -> 389 bytes
 .../main/code/_4_student_effort/Main.class    | Bin 0 -> 401 bytes
 .../_1_iterator/ArrayCustomIterator.class     | Bin 0 -> 674 bytes
 .../_2_strategy/BubleSort.class               | Bin 0 -> 647 bytes
 .../_2_strategy/MergeSort.class               | Bin 0 -> 1062 bytes
 .../_2_strategy/SortingStrategy.class         | Bin 0 -> 169 bytes
 .../_2_strategy/StrategyExample.class         | Bin 0 -> 1305 bytes
 .../_3_proxy/Apartment.class                  | Bin 0 -> 653 bytes
 .../_3_proxy/RealEstateAgentProxy.class       | Bin 0 -> 1411 bytes
 .../_4_student_effort/_3_proxy/Student.class  | Bin 0 -> 715 bytes
 .../_4_observer/ObservedSubject.class         | Bin 0 -> 287 bytes
 .../_4_observer/Observer.class                | Bin 0 -> 173 bytes
 .../_4_observer/Student.class                 | Bin 0 -> 1568 bytes
 .../_4_observer/Teacher.class                 | Bin 0 -> 1421 bytes
 .../_4_observer/TeachingClassExample.class    | Bin 0 -> 1219 bytes
 .../_5_template_method/AscBubbleSort.class    | Bin 0 -> 546 bytes
 .../_5_template_method/DescBubbleSort.class   | Bin 0 -> 549 bytes
 .../TemplateMethodBubbleSort.class            | Bin 0 -> 688 bytes
 .../TemplateMethodExample.class               | Bin 0 -> 1826 bytes
 .../_6_Builder/Person$Builder.class           | Bin 0 -> 1326 bytes
 .../_4_student_effort/_6_Builder/Person.class | Bin 0 -> 818 bytes
 104 files changed, 665 insertions(+), 4 deletions(-)
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Main.class
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Package1/Employee.class
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Package1/EmployeeFactory.class
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Package1/HumanAbstractFactory.class
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Package1/HumanFactory.class
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Package1/Intern.class
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Package1/InternFactory.class
 create mode 100644 Proiect_java_1/out/production/Proiect_java_1/Package1/ObservedSubject.class
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diff --git a/Proiect_java_1/src/Main.java b/Proiect_java_1/src/Main.java
new file mode 100644
index 000000000..f42cd4c06
--- /dev/null
+++ b/Proiect_java_1/src/Main.java
@@ -0,0 +1,16 @@
+import Package1.*;
+
+public class Main
+{
+    public static void main(String[] args)
+    {
+        ObservedSubject supervisor1= HumanFactory.getObservedSubject(new SupervisorFactory());
+        Observer intern1=HumanFactory.getObserver(new InternFactory());
+        Observer  employee1=HumanFactory.getObserver(new EmployeeFactory());
+        supervisor1.register(intern1);
+        supervisor1.register(employee1);
+        supervisor1.notify("Excellent work!");
+        System.out.println("Feedback-ul intern-ului si al angajatului este:");
+        System.out.println(intern1.getFeedback());
+    }
+}
diff --git a/Proiect_java_1/src/Package1/Employee.java b/Proiect_java_1/src/Package1/Employee.java
new file mode 100644
index 000000000..d4ebda487
--- /dev/null
+++ b/Proiect_java_1/src/Package1/Employee.java
@@ -0,0 +1,33 @@
+package Package1;
+
+public class Employee implements Observer
+{
+    private String nume;
+    private Integer varsta;
+    private String specializare;
+    private Integer aniExperienta;
+    private String sup;
+    private String feedback;
+
+    public Employee(String n,Integer v,String spec,Integer a,String suup,String fdb)
+    {
+        nume=n;
+        varsta=v;
+        specializare=spec;
+        aniExperienta=a;
+        sup=suup;
+        feedback=fdb;
+    }
+    public Employee()
+    {
+        this("",0,"",0,"","");
+    }
+    public void update(String message)
+    {
+        feedback=message;
+    }
+    public String getFeedback()
+    {
+        return feedback;
+    }
+}
diff --git a/Proiect_java_1/src/Package1/EmployeeFactory.java b/Proiect_java_1/src/Package1/EmployeeFactory.java
new file mode 100644
index 000000000..c83ffa904
--- /dev/null
+++ b/Proiect_java_1/src/Package1/EmployeeFactory.java
@@ -0,0 +1,28 @@
+package Package1;
+
+import java.util.Scanner;
+
+public class EmployeeFactory implements HumanAbstractFactory
+{
+    public Observer createObserver()
+    {
+        System.out.println("Introduceti date despre un nou angajat");
+        Scanner input=new Scanner(System.in);
+        System.out.println("Nume;");
+        String n=input.next();
+        System.out.println("Varsta");
+        Integer v=input.nextInt();
+        System.out.println("Specializare:");
+        String s=input.next();
+        System.out.println("Ani_Experienta: ");
+        Integer ani=input.nextInt();
+        System.out.println("Nume Supervisor:");
+        String sup=input.next();
+        return new Employee(n,v,s,ani,sup,"");
+    }
+
+    @Override
+    public ObservedSubject createObservedSubject() {
+        return null;
+    }
+}
diff --git a/Proiect_java_1/src/Package1/HumanAbstractFactory.java b/Proiect_java_1/src/Package1/HumanAbstractFactory.java
new file mode 100644
index 000000000..bb6214ba9
--- /dev/null
+++ b/Proiect_java_1/src/Package1/HumanAbstractFactory.java
@@ -0,0 +1,7 @@
+package Package1;
+
+public interface HumanAbstractFactory
+{
+    public ObservedSubject createObservedSubject();
+    public Observer createObserver();
+}
diff --git a/Proiect_java_1/src/Package1/HumanFactory.java b/Proiect_java_1/src/Package1/HumanFactory.java
new file mode 100644
index 000000000..ab39ab5f9
--- /dev/null
+++ b/Proiect_java_1/src/Package1/HumanFactory.java
@@ -0,0 +1,13 @@
+package Package1;
+
+public class HumanFactory
+{
+    public static ObservedSubject getObservedSubject(HumanAbstractFactory h)
+    {
+        return h.createObservedSubject();
+    }
+    public static Observer getObserver(HumanAbstractFactory h)
+    {
+        return h.createObserver();
+    }
+}
diff --git a/Proiect_java_1/src/Package1/Intern.java b/Proiect_java_1/src/Package1/Intern.java
new file mode 100644
index 000000000..34691a2d8
--- /dev/null
+++ b/Proiect_java_1/src/Package1/Intern.java
@@ -0,0 +1,33 @@
+package Package1;
+
+public class Intern implements Observer
+{
+    private String nume;
+    private String facultate;
+    private Integer varsta;
+    private boolean experientaAnterioara;
+    private String sup;
+    String feedback;
+
+    public Intern(String n,String f,Integer v,boolean e,String s,String fdb)
+    {
+        nume=n;
+        facultate=f;
+        varsta=v;
+        experientaAnterioara=e;
+        sup=s;
+        feedback=fdb;
+    }
+    public Intern()
+    {
+        this("","",0,false,"","");
+    }
+    public void update(String message)
+    {
+        feedback=message;
+    }
+    public String getFeedback()
+    {
+        return feedback;
+    }
+}
diff --git a/Proiect_java_1/src/Package1/InternFactory.java b/Proiect_java_1/src/Package1/InternFactory.java
new file mode 100644
index 000000000..aa7ae9a7d
--- /dev/null
+++ b/Proiect_java_1/src/Package1/InternFactory.java
@@ -0,0 +1,28 @@
+package Package1;
+
+import java.util.Scanner;
+
+public class InternFactory implements HumanAbstractFactory
+{
+    public Observer createObserver()
+    {
+        System.out.println("Introduceti date despre un nou intern");
+        Scanner input=new Scanner(System.in);
+        System.out.println("Nume;");
+        String n=input.next();
+        System.out.println("Facultate");
+        String f=input.next();
+        System.out.println("Varsta:");
+        Integer v=input.nextInt();
+        System.out.println("Experienta:(True/False) ");
+        boolean e=input.nextBoolean();
+        System.out.println("Nume Supervisor:");
+        String sup=input.next();
+        return new Intern(n,f,v,e,sup,"");
+    }
+
+    @Override
+    public ObservedSubject createObservedSubject() {
+        return null;
+    }
+}
diff --git a/Proiect_java_1/src/Package1/ObservedSubject.java b/Proiect_java_1/src/Package1/ObservedSubject.java
new file mode 100644
index 000000000..1d85607ff
--- /dev/null
+++ b/Proiect_java_1/src/Package1/ObservedSubject.java
@@ -0,0 +1,7 @@
+package Package1;
+
+public interface ObservedSubject {
+    void register(Observer obj);
+    void unregister(Observer obj);
+    void notify(String message);
+}
diff --git a/Proiect_java_1/src/Package1/Observer.java b/Proiect_java_1/src/Package1/Observer.java
new file mode 100644
index 000000000..c9d68ba28
--- /dev/null
+++ b/Proiect_java_1/src/Package1/Observer.java
@@ -0,0 +1,7 @@
+package Package1;
+
+public interface Observer {
+    void update(String message);
+
+    public String getFeedback();
+}
diff --git a/Proiect_java_1/src/Package1/Supervisor.java b/Proiect_java_1/src/Package1/Supervisor.java
new file mode 100644
index 000000000..e59a9b488
--- /dev/null
+++ b/Proiect_java_1/src/Package1/Supervisor.java
@@ -0,0 +1,50 @@
+package Package1;
+
+import java.util.Arrays;
+
+public class Supervisor implements ObservedSubject
+{
+    private Observer[] observers=new Observer[0];
+
+    private String nume;
+    private String departament;
+    private Integer varsta;
+
+    public Supervisor(String n,String d,Integer v)
+    {
+        nume=n;
+        departament=d;
+        varsta=v;
+    }
+    public Supervisor()
+    {
+        this("","",0);
+    }
+
+    public void register(Observer obs)
+    {
+        this.observers= Arrays.copyOf(observers,observers.length+1);
+        observers[this.observers.length-1]=obs;
+    }
+    public void unregister(Observer obs)
+    {
+        int removedIndex=-1;
+        for(int i=0;i< observers.length;i++)
+        {
+            if(observers[i].equals(obs))
+            {
+                removedIndex = i;
+                break;
+            }
+        }
+        System.arraycopy(observers,removedIndex+1,observers,removedIndex,observers.length-removedIndex-1);
+    }
+
+    public void notify(String message)
+    {
+        for(int i=0;i<observers.length;i++)
+        {
+            observers[i].update(message);
+        }
+    }
+}
diff --git a/Proiect_java_1/src/Package1/SupervisorFactory.java b/Proiect_java_1/src/Package1/SupervisorFactory.java
new file mode 100644
index 000000000..0958704a7
--- /dev/null
+++ b/Proiect_java_1/src/Package1/SupervisorFactory.java
@@ -0,0 +1,24 @@
+package Package1;
+
+import java.util.Scanner;
+
+public class SupervisorFactory implements HumanAbstractFactory
+{
+    public ObservedSubject createObservedSubject()
+    {
+        System.out.println("Introduceti date despre nou Supervisor:");
+        Scanner input=new Scanner(System.in);
+        System.out.println("Nume:");
+        String nume=input.next();
+        System.out.println("Departament: ");
+        String dep=input.next();
+        System.out.println("Varsta: ");
+        Integer v=input.nextInt();
+        return new Supervisor(nume,dep,v);
+    }
+
+    @Override
+    public Observer createObserver() {
+        return null;
+    }
+}
diff --git a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java
index a3768c391..46d19f738 100644
--- a/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java
+++ b/_2_oo/src/main/java/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.java
@@ -9,5 +9,6 @@ public static void main(String[] args)
         Animal a=new Fish();
         Animal e=new Spider();
         Pet p=new Cat();
+        System.out.println("Ce face puiu?");
     }
 }
diff --git a/_2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.class b/_2_oo/src/out/production/_2_oo/code/_4_student_effort/_3_animal_hierarchy/TestAnimals.class
index 4cb6997e81497c177d91c4aa32ba3fd3d76e9a8a..1d583a80c77e82b7d391eb6608d6e7757bc9773d 100644
GIT binary patch
delta 387
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delta 228
zcmYL@O%B0u6vTi3mR1`!#8-WP(-J!?aRWDSAp5QzLM$W}B$n>r5H8S|>cVE`&6}B*
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z79gM{<<X|2O<F!F;fPo9+g_Ib?Eok4=9>Goy~`4G=}8rs&}X22S=WY)^iDv9vG%r<
T&s0;6r4lpddepE`&m#N+y|opI

diff --git a/_3_design_patterns/src/main/java/code/_2_challenge/_5_template_method/TemplateMethodBubleSort.java b/_3_design_patterns/src/main/java/code/_2_challenge/_5_template_method/TemplateMethodBubleSort.java
index a1cfdbcb5..f65b2dddf 100644
--- a/_3_design_patterns/src/main/java/code/_2_challenge/_5_template_method/TemplateMethodBubleSort.java
+++ b/_3_design_patterns/src/main/java/code/_2_challenge/_5_template_method/TemplateMethodBubleSort.java
@@ -5,7 +5,8 @@ public abstract class TemplateMethodBubleSort {
     public void sort(Integer[] list) {
         for (int i = 0; i < list.length - 1; i++) {
             for (int j = i + 1; j < list.length; j++) {
-                if (numbersInCorrectOrder(list[i], list[j])) {
+                if (numbersInCorrectOrder(list[i], list[j]))
+                {
                     Integer temp = list[i];
                     list[i] = list[j];
                     list[j] = temp;
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/Main.java b/_3_design_patterns/src/main/java/code/_4_student_effort/Main.java
index 95bb1182c..f03cabb69 100644
--- a/_3_design_patterns/src/main/java/code/_4_student_effort/Main.java
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/Main.java
@@ -1,8 +1,16 @@
 package code._4_student_effort;
 
-public class Main {
+import code._4_student_effort._1_iterator.ArrayCustomIterator;
 
-    public static void main(String[] args) {
-        //TODO put your code changes in here
+public class Main
+{
+    public static void main(String[] args)
+    {
+        /* // Exercitiul 1
+        int[] arr=new int[] {1,2,3};
+        ArrayCustomIterator it=new ArrayCustomIterator(arr);
+        while(it.hasnext())
+            System.out.println(it.next());
+         */
     }
 }
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_1_iterator/ArrayCustomIterator.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_1_iterator/ArrayCustomIterator.java
new file mode 100644
index 000000000..36154e9cb
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_1_iterator/ArrayCustomIterator.java
@@ -0,0 +1,26 @@
+package code._4_student_effort._1_iterator;
+
+import java.lang.reflect.Array;
+
+public class ArrayCustomIterator
+{
+    private int [] arr;
+    private int currentindex;
+
+    public ArrayCustomIterator(int [] arr)
+    {
+        this.arr=arr;
+        this.currentindex=0;
+    }
+    public boolean hasnext()
+    {
+        if(this.currentindex!=this.arr.length)
+            return true;
+        return false;
+    }
+    public int next()
+    {
+        this.currentindex=this.currentindex+1;
+        return this.arr[currentindex-1];
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/BubleSort.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/BubleSort.java
new file mode 100644
index 000000000..7f96b2dc4
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/BubleSort.java
@@ -0,0 +1,17 @@
+package code._4_student_effort._2_strategy;
+
+public class BubleSort implements SortingStrategy
+{
+    public void sort(int [] v)
+    {
+        for(int i=0;i<v.length-1;i++)
+            for(int j=i+1;j<v.length;j++)
+                if(v[i]>v[j])
+                {
+                    int aux;
+                    aux=v[i];
+                    v[i]=v[j];
+                    v[j]=aux;
+                }
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/MergeSort.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/MergeSort.java
new file mode 100644
index 000000000..c4dd090b9
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/MergeSort.java
@@ -0,0 +1,39 @@
+package code._4_student_effort._2_strategy;
+
+import java.util.Arrays;
+
+public class MergeSort implements SortingStrategy
+{
+    public void sort(int [] list) {
+        if (list.length < 2) {
+            return;
+        }
+        int mid = list.length / 2;
+        int [] left = Arrays.copyOfRange(list, 0, mid);
+        int[] right = Arrays.copyOfRange(list, mid, list.length);
+
+        sort(left);
+        sort(right);
+        merge(left, right, list);
+    }
+
+    private void merge(int [] left, int [] right, int [] list) {
+        int leftIndex = 0;
+        int rightIndex = 0;
+        int listIndex = 0;
+
+        while (leftIndex < left.length && rightIndex < right.length) {
+            if (left[leftIndex]>right[rightIndex]) {
+                list[listIndex++] = left[leftIndex++];
+            } else {
+                list[listIndex++] = right[rightIndex++];
+            }
+        }
+        while (leftIndex < left.length) {
+            list[listIndex++] = left[leftIndex++];
+        }
+        while (rightIndex < right.length) {
+            list[listIndex++] = right[rightIndex++];
+        }
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/SortingStrategy.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/SortingStrategy.java
new file mode 100644
index 000000000..71b0746c8
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/SortingStrategy.java
@@ -0,0 +1,6 @@
+package code._4_student_effort._2_strategy;
+
+public interface SortingStrategy
+{
+    public void sort(int [] v);
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/StrategyExample.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/StrategyExample.java
new file mode 100644
index 000000000..9e9c43b6e
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_2_strategy/StrategyExample.java
@@ -0,0 +1,21 @@
+package code._4_student_effort._2_strategy;
+
+import java.util.Arrays;
+
+public class StrategyExample
+{
+    public static void main(String[] args)
+    {
+        int [] arr=new int[] {1,4,5,2,3,6,9,8,7};
+        int [] copy01ofArr= Arrays.copyOf(arr,arr.length);
+        int [] copy02ofArr=Arrays.copyOf(arr,arr.length);
+        displaySorted(new BubleSort(),copy01ofArr);
+        displaySorted(new MergeSort(),copy02ofArr);
+    }
+    public static void displaySorted(SortingStrategy strategy,int [] v)
+    {
+        strategy.sort(v);
+        for(int i=0;i<v.length;i++)
+            System.out.println(v[i]);
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/Apartment.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/Apartment.java
new file mode 100644
index 000000000..bb0fe096f
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/Apartment.java
@@ -0,0 +1,21 @@
+package code._4_student_effort._3_proxy;
+
+public class Apartment
+{
+    private String location;
+    private int monthlyRentCost;
+
+    public Apartment(String a, int b)
+    {
+        location=a;
+        monthlyRentCost=b;
+    }
+    public Apartment()
+    {
+        this("",0);
+    }
+    public int getMonthlyRentCost()
+    {
+        return monthlyRentCost;
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/RealEstateAgentProxy.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/RealEstateAgentProxy.java
new file mode 100644
index 000000000..743895415
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/RealEstateAgentProxy.java
@@ -0,0 +1,25 @@
+package code._4_student_effort._3_proxy;
+
+import java.util.Arrays;
+
+public class RealEstateAgentProxy {
+    private Apartment[] appartments = new Apartment[0];
+
+    public void represent(Apartment apartament) {
+        this.appartments = Arrays.copyOf(this.appartments, this.appartments.length + 1);
+        this.appartments[this.appartments.length - 1] = apartament;
+    }
+
+    public Apartment rent(Student student) {
+        Apartment rentedAppartment = null;
+        if (!(student.getName().startsWith("P"))) {
+            for (int i = 0; i < appartments.length; i++) {
+                if (this.appartments[i].getMonthlyRentCost() < student.getMoney()) {
+                    rentedAppartment = appartments[i];
+                    int removeIndex = i;
+                }
+            }
+        }
+        return rentedAppartment;
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/Student.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/Student.java
new file mode 100644
index 000000000..a3148296c
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_3_proxy/Student.java
@@ -0,0 +1,26 @@
+package code._4_student_effort._3_proxy;
+
+public class Student
+{
+    private String name;
+    private int money;
+
+    public Student(String name,int money)
+    {
+        this.name=name;
+        this.money=money;
+    }
+    public Student()
+    {
+        this.name="";
+        this.money=0;
+    }
+    public String getName()
+    {
+        return name;
+    }
+    public int getMoney()
+    {
+        return money;
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/ObservedSubject.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/ObservedSubject.java
new file mode 100644
index 000000000..de8677f27
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/ObservedSubject.java
@@ -0,0 +1,8 @@
+package code._4_student_effort._4_observer;
+
+public interface ObservedSubject
+{
+    public void register(Observer obj);
+    public void unregister(Observer obj);
+    public void notifyObservers(String message);
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Observer.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Observer.java
new file mode 100644
index 000000000..85305c383
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Observer.java
@@ -0,0 +1,6 @@
+package code._4_student_effort._4_observer;
+
+public interface Observer
+{
+    public void update(String message);
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Student.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Student.java
new file mode 100644
index 000000000..9da137f2e
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Student.java
@@ -0,0 +1,23 @@
+package code._4_student_effort._4_observer;
+
+public class Student implements Observer
+{
+    private String name;
+
+    public Student(String m)
+    {
+        name=m;
+    }
+    public Student()
+    {
+        this("");
+    }
+    public void listenTo(Teacher t)
+    {
+        t.register(this);
+    }
+    public void update(String message)
+    {
+        System.out.println("Studentul "+name+" a invata astazi despre "+message);
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Teacher.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Teacher.java
new file mode 100644
index 000000000..42712452d
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/Teacher.java
@@ -0,0 +1,31 @@
+package code._4_student_effort._4_observer;
+
+import java.util.Arrays;
+
+public class Teacher implements ObservedSubject
+{
+    private Observer [] observers=new Observer[0];
+
+    public void register(Observer obj)
+    {
+        observers= Arrays.copyOf(observers, observers.length+1);
+        observers[observers.length-1]=obj;
+    }
+    public void unregister(Observer obj)
+    {
+        int removeIndex=-1;
+        for(int i=0;i<observers.length;i++)
+            if(observers[i].equals(obj))
+            {
+                removeIndex=i;
+            }
+        System.arraycopy(observers,removeIndex+1,observers,removeIndex,observers.length-removeIndex-1);
+    }
+    public void notifyObservers(String message)
+    {
+        for(int i=0;i< observers.length;i++)
+        {
+            observers[i].update((message));
+        }
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/TeachingClassExample.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/TeachingClassExample.java
new file mode 100644
index 000000000..e6d1c9077
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_4_observer/TeachingClassExample.java
@@ -0,0 +1,24 @@
+package code._4_student_effort._4_observer;
+
+public class TeachingClassExample
+{
+    public static void main(String[] args) {
+        Teacher teacher = new Teacher();
+        Student s01 = new Student("Popescu");
+        Student s02 = new Student("Ionescu");
+        Student s03 = new Student("Dragomirescu");
+
+        s01.listenTo(teacher);
+        s02.listenTo(teacher);
+        s03.listenTo(teacher);
+
+        String[] javaTopics = new String[]{
+                "basics",
+                "oo",
+                "design patterns"
+        };
+        for (int i = 0; i < javaTopics.length; i++) {
+            teacher.notifyObservers(javaTopics[i]);
+        }
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/AscBubbleSort.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/AscBubbleSort.java
new file mode 100644
index 000000000..bde0b931b
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/AscBubbleSort.java
@@ -0,0 +1,11 @@
+package code._4_student_effort._5_template_method;
+
+public class AscBubbleSort extends TemplateMethodBubbleSort
+{
+    public boolean compara(int a,int b)
+    {
+        if(a>b)
+            return true;
+        return false;
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/DescBubbleSort.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/DescBubbleSort.java
new file mode 100644
index 000000000..ebbb63b73
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/DescBubbleSort.java
@@ -0,0 +1,11 @@
+package code._4_student_effort._5_template_method;
+
+public class DescBubbleSort extends TemplateMethodBubbleSort
+{
+    public boolean compara(int a,int b)
+    {
+        if(a<b)
+            return true;
+        return false;
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/TemplateMethodBubbleSort.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/TemplateMethodBubbleSort.java
new file mode 100644
index 000000000..9067b7f1e
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/TemplateMethodBubbleSort.java
@@ -0,0 +1,18 @@
+package code._4_student_effort._5_template_method;
+
+public abstract class TemplateMethodBubbleSort
+{
+    public void sort(int [] v)
+    {
+        for(int i=0;i<v.length-1;i++)
+            for(int j=i+1;j<v.length;j++)
+                if(compara(v[i],v[j]))
+                {
+                    int aux;
+                    aux=v[i];
+                    v[i]=v[j];
+                    v[j]=aux;
+                }
+    }
+    public abstract boolean compara(int a,int b);
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/TemplateMethodExample.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/TemplateMethodExample.java
new file mode 100644
index 000000000..8f5fd1ae2
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_5_template_method/TemplateMethodExample.java
@@ -0,0 +1,26 @@
+package code._4_student_effort._5_template_method;
+
+import java.util.Arrays;
+
+public class TemplateMethodExample
+{
+    public static void main(String[] args)
+    {
+        int[] arr = new int[]{1, 4, 5, 2, 3, 6, 9, 8, 7};
+        int[] copy01OfArr = Arrays.copyOf(arr, arr.length);
+        int[] copy02OfArr = Arrays.copyOf(arr, arr.length);
+
+        AscBubbleSort asc=new AscBubbleSort();
+        asc.sort(copy01OfArr);
+        DescBubbleSort desc=new DescBubbleSort();
+        desc.sort(copy02OfArr);
+        afiseaza(copy01OfArr);
+        System.out.println();
+        afiseaza(copy02OfArr);
+    }
+    public static void afiseaza(int [] v)
+    {
+        for(int i=0;i<v.length;i++)
+            System.out.print(v[i]+" , ");
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_6_Builder/Example.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_6_Builder/Example.java
new file mode 100644
index 000000000..193b18a1d
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_6_Builder/Example.java
@@ -0,0 +1,14 @@
+package code._4_student_effort._6_Builder;
+
+public class Example
+{
+    public static void main(String[] args)
+    {
+        Person person01 = new Person.Builder("Popescu")
+                .setJob("java developer")
+                .setUniversity("FMI")
+                .setMarried(false)
+                .build();
+
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/_6_Builder/Person.java b/_3_design_patterns/src/main/java/code/_4_student_effort/_6_Builder/Person.java
new file mode 100644
index 000000000..c95f4f833
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/_6_Builder/Person.java
@@ -0,0 +1,52 @@
+package code._4_student_effort._6_Builder;
+
+public class Person
+{
+    private String nume;
+    private String job;
+    private String university;
+    private String drivingLicense;
+    private boolean isMarried;
+
+    public Person(Builder builder)
+    {
+        nume=builder.nume;
+        job=builder.job;
+        university=builder.university;
+        drivingLicense=builder.drivingLicense;
+        isMarried=builder.isMarried;
+    }
+    public static class Builder
+    {
+        private final String nume;
+        private String job;
+        private String university;
+        private String drivingLicense;
+        private boolean isMarried;
+
+        public Builder(String name)
+        {
+            nume=name;
+        }
+        public void setJob(String j)
+        {
+            job=j;
+        }
+        public void setUniversity(String u)
+        {
+            university=u;
+        }
+        public void setDrivingLicense(String d)
+        {
+            drivingLicense=d;
+        }
+        public void setMarried(Boolean ok)
+        {
+            isMarried=ok;
+        }
+        public Person build()
+        {
+            return new Person(this);
+        }
+    }
+}
diff --git a/_3_design_patterns/src/main/out/production/main/code/_1_study/DesignPatternsUsedInJavaApis$Behavioral.class b/_3_design_patterns/src/main/out/production/main/code/_1_study/DesignPatternsUsedInJavaApis$Behavioral.class
new file mode 100644
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diff --git a/_3_design_patterns/src/main/out/production/main/code/_1_study/DesignPatternsUsedInJavaApis$Structural.class b/_3_design_patterns/src/main/out/production/main/code/_1_study/DesignPatternsUsedInJavaApis$Structural.class
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new file mode 100644
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diff --git a/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_1_iterator/ArrayCustomIterator.class b/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_1_iterator/ArrayCustomIterator.class
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diff --git a/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/BubleSort.class b/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/BubleSort.class
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diff --git a/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/MergeSort.class b/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/MergeSort.class
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diff --git a/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/SortingStrategy.class b/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/SortingStrategy.class
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diff --git a/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/StrategyExample.class b/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_2_strategy/StrategyExample.class
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diff --git a/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_6_Builder/Person.class b/_3_design_patterns/src/main/out/production/main/code/_4_student_effort/_6_Builder/Person.class
new file mode 100644
index 0000000000000000000000000000000000000000..8fde3105e728c43924afb84f0d98f8c63f6d508f
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From 0b471d059204ec7e1a1f9641d9b9b61569cd2fd5 Mon Sep 17 00:00:00 2001
From: Fabian-Florin Neagu <fabian.f.neagu10@gmail.com>
Date: Sun, 28 Nov 2021 16:49:20 +0200
Subject: [PATCH 4/6] Proiect 1 - modificare 1

---
 Proiect_java_1/src/Package1/SupervisorFactory.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Proiect_java_1/src/Package1/SupervisorFactory.java b/Proiect_java_1/src/Package1/SupervisorFactory.java
index 0958704a7..736a8eaf3 100644
--- a/Proiect_java_1/src/Package1/SupervisorFactory.java
+++ b/Proiect_java_1/src/Package1/SupervisorFactory.java
@@ -22,3 +22,4 @@ public Observer createObserver() {
         return null;
     }
 }
+

From 15ef01e64d98faa954e00cefed21036fc9cca1af Mon Sep 17 00:00:00 2001
From: Fabian-Florin Neagu <fabian.f.neagu10@gmail.com>
Date: Sun, 28 Nov 2021 16:51:22 +0200
Subject: [PATCH 5/6] Proiect 1 - Modificare 2

---
 .../out/production/Proiect_java_1/Main.class  | Bin 0 -> 1253 bytes
 .../Proiect_java_1/Package1/Employee.class    | Bin 0 -> 1158 bytes
 .../Package1/EmployeeFactory.class            | Bin 0 -> 1500 bytes
 .../Package1/HumanAbstractFactory.class       | Bin 0 -> 242 bytes
 .../Package1/HumanFactory.class               | Bin 0 -> 746 bytes
 .../Proiect_java_1/Package1/Intern.class      | Bin 0 -> 1133 bytes
 .../Package1/InternFactory.class              | Bin 0 -> 1507 bytes
 .../Package1/ObservedSubject.class            | Bin 0 -> 226 bytes
 .../Proiect_java_1/Package1/Observer.class    | Bin 0 -> 192 bytes
 .../Proiect_java_1/Package1/Supervisor.class  | Bin 0 -> 1644 bytes
 .../Package1/SupervisorFactory.class          | Bin 0 -> 1326 bytes
 .../Proiect_java_1/src/Main.java              |  16 ++++++
 .../Proiect_java_1/src/Package1/Employee.java |  33 ++++++++++++
 .../src/Package1/EmployeeFactory.java         |  28 ++++++++++
 .../src/Package1/HumanAbstractFactory.java    |   7 +++
 .../src/Package1/HumanFactory.java            |  13 +++++
 .../Proiect_java_1/src/Package1/Intern.java   |  33 ++++++++++++
 .../src/Package1/InternFactory.java           |  28 ++++++++++
 .../src/Package1/ObservedSubject.java         |   7 +++
 .../Proiect_java_1/src/Package1/Observer.java |   7 +++
 .../src/Package1/Supervisor.java              |  50 ++++++++++++++++++
 .../src/Package1/SupervisorFactory.java       |  25 +++++++++
 22 files changed, 247 insertions(+)
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Main.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/Employee.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/EmployeeFactory.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/HumanAbstractFactory.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/HumanFactory.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/Intern.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/InternFactory.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/ObservedSubject.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/Observer.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/Supervisor.class
 create mode 100644 clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/SupervisorFactory.class
 create mode 100644 clean_code_projects/Proiect_java_1/src/Main.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/Employee.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/EmployeeFactory.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/HumanAbstractFactory.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/HumanFactory.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/Intern.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/InternFactory.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/ObservedSubject.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/Observer.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/Supervisor.java
 create mode 100644 clean_code_projects/Proiect_java_1/src/Package1/SupervisorFactory.java

diff --git a/clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Main.class b/clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Main.class
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diff --git a/clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/ObservedSubject.class b/clean_code_projects/Proiect_java_1/out/production/Proiect_java_1/Package1/ObservedSubject.class
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diff --git a/clean_code_projects/Proiect_java_1/src/Main.java b/clean_code_projects/Proiect_java_1/src/Main.java
new file mode 100644
index 000000000..f42cd4c06
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Main.java
@@ -0,0 +1,16 @@
+import Package1.*;
+
+public class Main
+{
+    public static void main(String[] args)
+    {
+        ObservedSubject supervisor1= HumanFactory.getObservedSubject(new SupervisorFactory());
+        Observer intern1=HumanFactory.getObserver(new InternFactory());
+        Observer  employee1=HumanFactory.getObserver(new EmployeeFactory());
+        supervisor1.register(intern1);
+        supervisor1.register(employee1);
+        supervisor1.notify("Excellent work!");
+        System.out.println("Feedback-ul intern-ului si al angajatului este:");
+        System.out.println(intern1.getFeedback());
+    }
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/Employee.java b/clean_code_projects/Proiect_java_1/src/Package1/Employee.java
new file mode 100644
index 000000000..d4ebda487
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/Employee.java
@@ -0,0 +1,33 @@
+package Package1;
+
+public class Employee implements Observer
+{
+    private String nume;
+    private Integer varsta;
+    private String specializare;
+    private Integer aniExperienta;
+    private String sup;
+    private String feedback;
+
+    public Employee(String n,Integer v,String spec,Integer a,String suup,String fdb)
+    {
+        nume=n;
+        varsta=v;
+        specializare=spec;
+        aniExperienta=a;
+        sup=suup;
+        feedback=fdb;
+    }
+    public Employee()
+    {
+        this("",0,"",0,"","");
+    }
+    public void update(String message)
+    {
+        feedback=message;
+    }
+    public String getFeedback()
+    {
+        return feedback;
+    }
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/EmployeeFactory.java b/clean_code_projects/Proiect_java_1/src/Package1/EmployeeFactory.java
new file mode 100644
index 000000000..c83ffa904
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/EmployeeFactory.java
@@ -0,0 +1,28 @@
+package Package1;
+
+import java.util.Scanner;
+
+public class EmployeeFactory implements HumanAbstractFactory
+{
+    public Observer createObserver()
+    {
+        System.out.println("Introduceti date despre un nou angajat");
+        Scanner input=new Scanner(System.in);
+        System.out.println("Nume;");
+        String n=input.next();
+        System.out.println("Varsta");
+        Integer v=input.nextInt();
+        System.out.println("Specializare:");
+        String s=input.next();
+        System.out.println("Ani_Experienta: ");
+        Integer ani=input.nextInt();
+        System.out.println("Nume Supervisor:");
+        String sup=input.next();
+        return new Employee(n,v,s,ani,sup,"");
+    }
+
+    @Override
+    public ObservedSubject createObservedSubject() {
+        return null;
+    }
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/HumanAbstractFactory.java b/clean_code_projects/Proiect_java_1/src/Package1/HumanAbstractFactory.java
new file mode 100644
index 000000000..bb6214ba9
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/HumanAbstractFactory.java
@@ -0,0 +1,7 @@
+package Package1;
+
+public interface HumanAbstractFactory
+{
+    public ObservedSubject createObservedSubject();
+    public Observer createObserver();
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/HumanFactory.java b/clean_code_projects/Proiect_java_1/src/Package1/HumanFactory.java
new file mode 100644
index 000000000..ab39ab5f9
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/HumanFactory.java
@@ -0,0 +1,13 @@
+package Package1;
+
+public class HumanFactory
+{
+    public static ObservedSubject getObservedSubject(HumanAbstractFactory h)
+    {
+        return h.createObservedSubject();
+    }
+    public static Observer getObserver(HumanAbstractFactory h)
+    {
+        return h.createObserver();
+    }
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/Intern.java b/clean_code_projects/Proiect_java_1/src/Package1/Intern.java
new file mode 100644
index 000000000..34691a2d8
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/Intern.java
@@ -0,0 +1,33 @@
+package Package1;
+
+public class Intern implements Observer
+{
+    private String nume;
+    private String facultate;
+    private Integer varsta;
+    private boolean experientaAnterioara;
+    private String sup;
+    String feedback;
+
+    public Intern(String n,String f,Integer v,boolean e,String s,String fdb)
+    {
+        nume=n;
+        facultate=f;
+        varsta=v;
+        experientaAnterioara=e;
+        sup=s;
+        feedback=fdb;
+    }
+    public Intern()
+    {
+        this("","",0,false,"","");
+    }
+    public void update(String message)
+    {
+        feedback=message;
+    }
+    public String getFeedback()
+    {
+        return feedback;
+    }
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/InternFactory.java b/clean_code_projects/Proiect_java_1/src/Package1/InternFactory.java
new file mode 100644
index 000000000..aa7ae9a7d
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/InternFactory.java
@@ -0,0 +1,28 @@
+package Package1;
+
+import java.util.Scanner;
+
+public class InternFactory implements HumanAbstractFactory
+{
+    public Observer createObserver()
+    {
+        System.out.println("Introduceti date despre un nou intern");
+        Scanner input=new Scanner(System.in);
+        System.out.println("Nume;");
+        String n=input.next();
+        System.out.println("Facultate");
+        String f=input.next();
+        System.out.println("Varsta:");
+        Integer v=input.nextInt();
+        System.out.println("Experienta:(True/False) ");
+        boolean e=input.nextBoolean();
+        System.out.println("Nume Supervisor:");
+        String sup=input.next();
+        return new Intern(n,f,v,e,sup,"");
+    }
+
+    @Override
+    public ObservedSubject createObservedSubject() {
+        return null;
+    }
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/ObservedSubject.java b/clean_code_projects/Proiect_java_1/src/Package1/ObservedSubject.java
new file mode 100644
index 000000000..1d85607ff
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/ObservedSubject.java
@@ -0,0 +1,7 @@
+package Package1;
+
+public interface ObservedSubject {
+    void register(Observer obj);
+    void unregister(Observer obj);
+    void notify(String message);
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/Observer.java b/clean_code_projects/Proiect_java_1/src/Package1/Observer.java
new file mode 100644
index 000000000..c9d68ba28
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/Observer.java
@@ -0,0 +1,7 @@
+package Package1;
+
+public interface Observer {
+    void update(String message);
+
+    public String getFeedback();
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/Supervisor.java b/clean_code_projects/Proiect_java_1/src/Package1/Supervisor.java
new file mode 100644
index 000000000..e59a9b488
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/Supervisor.java
@@ -0,0 +1,50 @@
+package Package1;
+
+import java.util.Arrays;
+
+public class Supervisor implements ObservedSubject
+{
+    private Observer[] observers=new Observer[0];
+
+    private String nume;
+    private String departament;
+    private Integer varsta;
+
+    public Supervisor(String n,String d,Integer v)
+    {
+        nume=n;
+        departament=d;
+        varsta=v;
+    }
+    public Supervisor()
+    {
+        this("","",0);
+    }
+
+    public void register(Observer obs)
+    {
+        this.observers= Arrays.copyOf(observers,observers.length+1);
+        observers[this.observers.length-1]=obs;
+    }
+    public void unregister(Observer obs)
+    {
+        int removedIndex=-1;
+        for(int i=0;i< observers.length;i++)
+        {
+            if(observers[i].equals(obs))
+            {
+                removedIndex = i;
+                break;
+            }
+        }
+        System.arraycopy(observers,removedIndex+1,observers,removedIndex,observers.length-removedIndex-1);
+    }
+
+    public void notify(String message)
+    {
+        for(int i=0;i<observers.length;i++)
+        {
+            observers[i].update(message);
+        }
+    }
+}
diff --git a/clean_code_projects/Proiect_java_1/src/Package1/SupervisorFactory.java b/clean_code_projects/Proiect_java_1/src/Package1/SupervisorFactory.java
new file mode 100644
index 000000000..736a8eaf3
--- /dev/null
+++ b/clean_code_projects/Proiect_java_1/src/Package1/SupervisorFactory.java
@@ -0,0 +1,25 @@
+package Package1;
+
+import java.util.Scanner;
+
+public class SupervisorFactory implements HumanAbstractFactory
+{
+    public ObservedSubject createObservedSubject()
+    {
+        System.out.println("Introduceti date despre nou Supervisor:");
+        Scanner input=new Scanner(System.in);
+        System.out.println("Nume:");
+        String nume=input.next();
+        System.out.println("Departament: ");
+        String dep=input.next();
+        System.out.println("Varsta: ");
+        Integer v=input.nextInt();
+        return new Supervisor(nume,dep,v);
+    }
+
+    @Override
+    public Observer createObserver() {
+        return null;
+    }
+}
+

From 2894728bb71a19a8bb87ecf4b005658b8e463235 Mon Sep 17 00:00:00 2001
From: Fabian-Florin Neagu <fabian.f.neagu10@gmail.com>
Date: Sun, 19 Dec 2021 17:33:10 +0200
Subject: [PATCH 6/6] Second Project finished

---
 .../_1_Phone_Book/PhoneBook.java              |  24 +++++++
 .../_4_student_effort/_2_incercare/Array.java |  20 ++++++
 .../_2_incercare/Incercare.java               |  11 ++++
 .../_2_incercare/SecretMessage.java           |  24 +++++++
 .../GenericLinkedListChallenge.java           |   4 +-
 .../_3_generic_linked_list/GenericList.java   |   5 +-
 .../_3_generic_linked_list/IGenericList.java  |   4 ++
 .../_1_exchange_desk/Currency.java            |  24 +++++++
 .../_1_exchange_desk/ExchangeDesk.java        |   6 ++
 .../_1_exchange_desk/Ron.java                 |  27 ++++++++
 .../_1_exchange_desk/USD.java                 |  21 ++++++
 .../_4_student_effort/_2_pairss/Boot.java     |  26 ++++++++
 .../_2_pairss/ColorDoesNotMatchException.java |   9 +++
 .../_4_student_effort/_2_pairss/Heels.java    |  25 ++++++++
 .../_4_student_effort/_2_pairss/Pair.java     |  31 +++++++++
 .../_2_pairss/RunnableClass.java              |  19 ++++++
 .../_4_student_effort/_2_pairss/Running.java  |  26 ++++++++
 .../_4_student_effort/_2_pairss/Shoe.java     |   7 ++
 .../_2_pairss/SizeDoNotMatchException.java    |   9 +++
 .../_3_genericc_linked_list/Example.java      |  18 ++++++
 .../_3_genericc_linked_list/GenericList.java  |  37 +++++++++++
 .../_3_genericc_linked_list/GenericNode.java  |  24 +++++++
 .../_3_genericc_linked_list/IGenericList.java |   8 +++
 .../_3_genericc_linked_list/IGenericNode.java |  10 +++
 .../_4_genericc_iterator/ArrayIterator.java   |  28 ++++++++
 .../_4_genericc_iterator/Example1.java        |  16 +++++
 .../_4_genericc_iterator/GenericList.java     |  37 +++++++++++
 .../_4_genericc_iterator/GenericNode.java     |  24 +++++++
 .../_4_genericc_iterator/IArrayIterator.java  |   7 ++
 .../_4_genericc_iterator/IGenericList.java    |   8 +++
 .../_4_genericc_iterator/IGenericNode.java    |  10 +++
 .../_4_genericc_iterator/ListIterator.java    |  29 +++++++++
 .../_5_genericc_binary_search/Main.java       |  20 ++++++
 .../GenericsActivity$BubleSort.class          | Bin 0 -> 966 bytes
 .../code/_0_activity/GenericsActivity.class   | Bin 0 -> 1242 bytes
 .../code/code/_1_study/_1_pecs/Pecs.class     | Bin 0 -> 778 bytes
 .../_2_heap_pollution/HeapPollution.class     | Bin 0 -> 1141 bytes
 .../code/_1_study/_3_type_errasure/Node.class | Bin 0 -> 665 bytes
 .../_1_study/_3_type_errasure/Node2.class     | Bin 0 -> 674 bytes
 .../_3_type_errasure/TypeErrasure.class       | Bin 0 -> 441 bytes
 .../_4_gloves_and_socks/ClothingItem.class    | Bin 0 -> 205 bytes
 .../_1_study/_4_gloves_and_socks/Glove.class  | Bin 0 -> 1229 bytes
 .../GlovesAndSocksExample.class               | Bin 0 -> 1326 bytes
 .../_1_study/_4_gloves_and_socks/Pair.class   | Bin 0 -> 1372 bytes
 .../PairDoesNotMatch.class                    | Bin 0 -> 415 bytes
 .../_1_study/_4_gloves_and_socks/Sock.class   | Bin 0 -> 1225 bytes
 .../_1_exchange_desk/Currency.class           | Bin 0 -> 609 bytes
 .../_1_exchange_desk/ExchangeDesk.class       | Bin 0 -> 1582 bytes
 .../ExchangeDeskChallenge.class               | Bin 0 -> 1222 bytes
 .../ExchangeDeskConversionException.class     | Bin 0 -> 462 bytes
 .../_2_challenge/_1_exchange_desk/Ron.class   | Bin 0 -> 1078 bytes
 .../_2_challenge/_1_exchange_desk/Usd.class   | Bin 0 -> 1082 bytes
 .../code/_2_challenge/_2_pairs/Boot.class     | Bin 0 -> 645 bytes
 .../_2_pairs/ColorsDoNotMatchException.class  | Bin 0 -> 428 bytes
 .../code/_2_challenge/_2_pairs/Heels.class    | Bin 0 -> 648 bytes
 .../code/_2_challenge/_2_pairs/Pair.class     | Bin 0 -> 1552 bytes
 .../_2_pairs/PairsChallenge.class             | Bin 0 -> 1237 bytes
 .../code/_2_challenge/_2_pairs/Running.class  | Bin 0 -> 654 bytes
 .../code/_2_challenge/_2_pairs/Shoe.class     | Bin 0 -> 182 bytes
 .../_2_pairs/SizesDoNotMatchException.class   | Bin 0 -> 425 bytes
 .../GenericLinkedListChallenge.class          | Bin 0 -> 560 bytes
 .../_3_generic_linked_list/GenericList.class  | Bin 0 -> 1901 bytes
 .../_3_generic_linked_list/GenericNode.class  | Bin 0 -> 1600 bytes
 .../_3_generic_linked_list/IGenericList.class | Bin 0 -> 291 bytes
 .../_3_generic_linked_list/IGenericNode.class | Bin 0 -> 631 bytes
 .../_4_generic_iterator/ArrayIterator.class   | Bin 0 -> 1081 bytes
 .../GenericIteratorChallenge.class            | Bin 0 -> 1749 bytes
 .../_4_generic_iterator/Glove.class           | Bin 0 -> 1183 bytes
 .../_4_generic_iterator/IArrayIterator.class  | Bin 0 -> 288 bytes
 .../_4_generic_iterator/Sock.class            | Bin 0 -> 1179 bytes
 .../ArrayNotSortedException.class             | Bin 0 -> 447 bytes
 .../GenericBinarySearchChallenge.class        | Bin 0 -> 3399 bytes
 .../code/code/_3_in_class/Main.class          | Bin 0 -> 389 bytes
 .../code/code/_4_student_effort/Main.class    | Bin 0 -> 401 bytes
 .../_1_exchange_desk/Currency.class           | Bin 0 -> 628 bytes
 .../_1_exchange_desk/ExchangeDesk.class       | Bin 0 -> 341 bytes
 .../_1_exchange_desk/Ron.class                | Bin 0 -> 1178 bytes
 .../_1_exchange_desk/USD.class                | Bin 0 -> 1112 bytes
 .../_4_student_effort/_2_pairss/Boot.class    | Bin 0 -> 747 bytes
 .../ColorDoesNotMatchException.class          | Bin 0 -> 443 bytes
 .../_4_student_effort/_2_pairss/Heels.class   | Bin 0 -> 750 bytes
 .../_4_student_effort/_2_pairss/Pair.class    | Bin 0 -> 1677 bytes
 .../_2_pairss/RunnableClass.class             | Bin 0 -> 1306 bytes
 .../_4_student_effort/_2_pairss/Running.class | Bin 0 -> 756 bytes
 .../_4_student_effort/_2_pairss/Shoe.class    | Bin 0 -> 188 bytes
 .../_2_pairss/SizeDoNotMatchException.class   | Bin 0 -> 434 bytes
 .../_3_genericc_linked_list/Example.class     | Bin 0 -> 1480 bytes
 .../_3_genericc_linked_list/GenericList.class | Bin 0 -> 1923 bytes
 .../_3_genericc_linked_list/GenericNode.class | Bin 0 -> 1666 bytes
 .../IGenericList.class                        | Bin 0 -> 403 bytes
 .../IGenericNode.class                        | Bin 0 -> 661 bytes
 .../_4_genericc_iterator/ArrayIterator.class  | Bin 0 -> 1243 bytes
 .../_4_genericc_iterator/Example1.class       | Bin 0 -> 1262 bytes
 .../_4_genericc_iterator/IArrayIterator.class | Bin 0 -> 294 bytes
 .../_1_lleaders/LeadersChalllenge.java        |  35 ++++++++++
 .../PascalTriangleChallenge.java              |  46 ++++++++++++++
 .../BellTriangleChallenge.java                |  43 +++++++++++++
 .../MergeSortedLists.java                     |  53 ++++++++++++++++
 .../_6_package_spiral/MatrixSpiral.java       |  60 ++++++++++++++++++
 .../_7_my_hashhtable/Challenge.java           |  26 ++++++++
 .../_7_my_hashhtable/MyHashhTable.java        |  10 +++
 .../_7_my_hashhtable/MyHashhTableImpl.java    |  32 ++++++++++
 .../_8_My_ArrayList/Challenge.java            |  17 +++++
 .../_8_My_ArrayList/MyArrayList.java          |  10 +++
 .../_8_My_ArrayList/MyArrayListImpl.java      |  36 +++++++++++
 .../_9_My_Set/Challenge.java                  |   9 +++
 .../_4_student_effort/_9_My_Set/MySet.java    |  11 ++++
 .../_9_My_Set/MySetImpl.java                  |  48 ++++++++++++++
 .../code/code/_0_activity/Activity.class      | Bin 0 -> 1241 bytes
 .../production/code/code/_1_study/Main.class  | Bin 0 -> 383 bytes
 .../_10_deque_interface/DequeExample.class    | Bin 0 -> 1005 bytes
 .../_11_set_interface/SetExample.class        | Bin 0 -> 1666 bytes
 .../_12_map_interface/MapExample.class        | Bin 0 -> 2648 bytes
 .../EqualsAndHashCodeExample$BadStudent.class | Bin 0 -> 808 bytes
 ...EqualsAndHashCodeExample$GoodStudent.class | Bin 0 -> 1079 bytes
 .../EqualsAndHashCodeExample.class            | Bin 0 -> 1473 bytes
 .../OrderingExample$Person$1.class            | Bin 0 -> 1183 bytes
 .../_14_ordering/OrderingExample$Person.class | Bin 0 -> 1822 bytes
 .../_14_ordering/OrderingExample.class        | Bin 0 -> 2002 bytes
 ...UnmodifiableCollectionExample$Person.class | Bin 0 -> 1178 bytes
 .../UnmodifiableCollectionExample.class       | Bin 0 -> 2126 bytes
 .../_1_checked_list/CheckedList.class         | Bin 0 -> 1539 bytes
 .../_2_remove_in_loop/RemoveInLoop.class      | Bin 0 -> 2231 bytes
 .../FailFastIterator.class                    | Bin 0 -> 1401 bytes
 .../FailSafeIterator.class                    | Bin 0 -> 1468 bytes
 .../ListIteratorExample.class                 | Bin 0 -> 1588 bytes
 ...SpliteratorExample$RemainingConsumer.class | Bin 0 -> 1076 bytes
 .../_6_spliterator/SpliteratorExample.class   | Bin 0 -> 2121 bytes
 .../CollectionExample.class                   | Bin 0 -> 959 bytes
 .../_8_list_interface/ListExample.class       | Bin 0 -> 1603 bytes
 .../QueueExample$Student.class                | Bin 0 -> 1298 bytes
 .../QueueExample$StudentGradeComparator.class | Bin 0 -> 1234 bytes
 ...QueueExample$StudentHeightComparator.class | Bin 0 -> 1238 bytes
 .../QueueExample$StudentNameComparator.class  | Bin 0 -> 1230 bytes
 .../_9_queue_interface/QueueExample.class     | Bin 0 -> 3881 bytes
 .../code/code/_2_challenge/Main.class         | Bin 0 -> 391 bytes
 .../_1_leaders/LeadersChallenge.class         | Bin 0 -> 1682 bytes
 .../PascalTriangleChallenge.class             | Bin 0 -> 2476 bytes
 .../BellTriangleChllenge.class                | Bin 0 -> 2464 bytes
 .../_4_zig_zag/ZigZagChallenge.class          | Bin 0 -> 1805 bytes
 .../MergeSortedListsChallenge.class           | Bin 0 -> 1996 bytes
 .../MatrixSpiralChallenge.class               | Bin 0 -> 3898 bytes
 .../_7_my_hashtable/MyHashTable.class         | Bin 0 -> 512 bytes
 .../MyHashTableChallenge.class                | Bin 0 -> 1118 bytes
 .../_7_my_hashtable/MyHashTableImpl.class     | Bin 0 -> 1664 bytes
 .../_8_my_arraylist/MyArrayList.class         | Bin 0 -> 413 bytes
 .../MyArrayListChallenge.class                | Bin 0 -> 1292 bytes
 .../_8_my_arraylist/MyArrayListImpl.class     | Bin 0 -> 1721 bytes
 .../code/_2_challenge/_9_my_set/MySet.class   | Bin 0 -> 455 bytes
 .../_9_my_set/MySetChallenge.class            | Bin 0 -> 1625 bytes
 .../_2_challenge/_9_my_set/MySetImpl.class    | Bin 0 -> 1970 bytes
 .../code/code/_3_in_class/Main.class          | Bin 0 -> 389 bytes
 .../code/code/_4_student_effort/Main.class    | Bin 0 -> 401 bytes
 .../_1_lleaders/LeadersChalllenge.class       | Bin 0 -> 2631 bytes
 .../PascalTriangleChallenge.class             | Bin 0 -> 2452 bytes
 .../BellTriangleChallenge.class               | Bin 0 -> 2474 bytes
 .../MergeSortedLists.class                    | Bin 0 -> 2959 bytes
 .../_6_package_spiral/MatrixSpiral.class      | Bin 0 -> 2326 bytes
 .../_7_my_hashhtable/Challenge.class          | Bin 0 -> 2155 bytes
 .../_7_my_hashhtable/MyHashhTable.class       | Bin 0 -> 520 bytes
 .../_7_my_hashhtable/MyHashhTableImpl.class   | Bin 0 -> 1704 bytes
 .../_8_My_ArrayList/Challenge.class           | Bin 0 -> 1719 bytes
 .../_8_My_ArrayList/MyArrayList.class         | Bin 0 -> 418 bytes
 .../_8_My_ArrayList/MyArrayListImpl.class     | Bin 0 -> 1757 bytes
 .../_1_rabbbit_race/Challenge.java            |  34 ++++++++++
 .../_1_rabbbit_race/RabbitRunnable.java       |  15 +++++
 .../_1_rabbbit_race/RabbitThread.java         |  17 +++++
 .../_2_Bank_transactions/BankAccount.java     |  33 ++++++++++
 .../_2_Bank_transactions/Challenge.java       |  41 ++++++++++++
 .../TransactionThread.java                    |  35 ++++++++++
 .../_3_rock_paper_scissors/Challenge.java     |  17 +++++
 .../_3_rock_paper_scissors/Player.java        |  30 +++++++++
 .../production/code/code/_1_study/Main.class  | Bin 0 -> 383 bytes
 .../_1_contention/ContentionExample.class     | Bin 0 -> 1521 bytes
 .../_1_study/_1_contention/MyThread.class     | Bin 0 -> 525 bytes
 .../_2_lack_of_coordination/Consumer.class    | Bin 0 -> 1219 bytes
 .../_2_lack_of_coordination/IChannel.class    | Bin 0 -> 211 bytes
 .../LackOfCoordinationChannel.class           | Bin 0 -> 822 bytes
 .../LackOfCoordinationExample.class           | Bin 0 -> 877 bytes
 .../_2_lack_of_coordination/Producer.class    | Bin 0 -> 815 bytes
 .../_3_good_coordination/Consumer.class       | Bin 0 -> 1204 bytes
 .../GoodCoordinationChannel.class             | Bin 0 -> 1100 bytes
 .../GoodCoordinationExample.class             | Bin 0 -> 842 bytes
 .../_3_good_coordination/IChannel.class       | Bin 0 -> 208 bytes
 .../_3_good_coordination/Producer.class       | Bin 0 -> 800 bytes
 .../_4_starvation/OnePersonKitchen.class      | Bin 0 -> 618 bytes
 .../code/_1_study/_4_starvation/Person.class  | Bin 0 -> 1795 bytes
 .../PersonThatNeverFinishesEating.class       | Bin 0 -> 1447 bytes
 .../_4_starvation/StarvationExample.class     | Bin 0 -> 1084 bytes
 .../_5_intrinsic_locks/BankAccount.class      | Bin 0 -> 1601 bytes
 .../IntrinsicLocksExample.class               | Bin 0 -> 1401 bytes
 .../TransactionThread.class                   | Bin 0 -> 1355 bytes
 .../_6_lock_objects/BankAccount.class         | Bin 0 -> 1948 bytes
 .../_6_lock_objects/LockObjectsExample.class  | Bin 0 -> 1368 bytes
 .../_6_lock_objects/TransactionThread.class   | Bin 0 -> 1262 bytes
 .../_1_study/_7_deadlock/BankAccount.class    | Bin 0 -> 1940 bytes
 .../_7_deadlock/DeadlockExample.class         | Bin 0 -> 1327 bytes
 .../_7_deadlock/TransactionThread.class       | Bin 0 -> 1587 bytes
 .../_1_study/_8_livelock/BankAccount.class    | Bin 0 -> 1945 bytes
 .../_8_livelock/LivelockExample.class         | Bin 0 -> 1327 bytes
 .../_8_livelock/TransactionThread.class       | Bin 0 -> 2047 bytes
 .../_9_executors/ExecutorsExample.class       | Bin 0 -> 1869 bytes
 .../code/_1_study/_9_executors/Task.class     | Bin 0 -> 1461 bytes
 .../code/code/_2_challenge/Main.class         | Bin 0 -> 391 bytes
 .../_1_rabbit_race/RabbitRaceChallenge.class  | Bin 0 -> 1547 bytes
 .../_1_rabbit_race/RabbitRunnable.class       | Bin 0 -> 771 bytes
 .../_1_rabbit_race/RabbitThread.class         | Bin 0 -> 761 bytes
 .../_2_bank_transactions/BankAccount.class    | Bin 0 -> 1613 bytes
 .../BankTransactionschallenge.class           | Bin 0 -> 1461 bytes
 .../TransactionThread.class                   | Bin 0 -> 1403 bytes
 .../RockPaperScissorsChallenge$Player.class   | Bin 0 -> 1070 bytes
 .../RockPaperScissorsChallenge.class          | Bin 0 -> 2194 bytes
 .../_1_dining_philosophers/Chopstick.class    | Bin 0 -> 697 bytes
 .../DiningPhilosophersChallenge.class         | Bin 0 -> 1816 bytes
 .../_1_dining_philosophers/Philosopher.class  | Bin 0 -> 1908 bytes
 .../code/code/_3_in_class/Main.class          | Bin 0 -> 448 bytes
 .../code/code/_4_student_effort/Main.class    | Bin 0 -> 401 bytes
 .../_1_rabbbit_race/Challenge.class           | Bin 0 -> 1305 bytes
 .../_1_rabbbit_race/RabbitRunnable.class      | Bin 0 -> 1095 bytes
 .../_1_rabbbit_race/RabbitThread.class        | Bin 0 -> 1061 bytes
 .../_2_Bank_transactions/BankAccount.class    | Bin 0 -> 1247 bytes
 .../_2_Bank_transactions/Challenge.class      | Bin 0 -> 1423 bytes
 .../TransactionThread.class                   | Bin 0 -> 1449 bytes
 .../_3_rock_paper_scissors/Challenge.class    | Bin 0 -> 1526 bytes
 .../_3_rock_paper_scissors/Player.class       | Bin 0 -> 1182 bytes
 .../code/chess/requirements/ChessBoard.java   |  57 +++++++++++++++--
 .../clean/code/chess/requirements/Pawn.java   |  21 +++++-
 .../chess/requirements/ChessBoardTest.java    |   2 +-
 .../code/chess/requirements/PawnTest.java     |   6 +-
 229 files changed, 1326 insertions(+), 16 deletions(-)
 create mode 100644 _4_exceptions_io/src/main/java/code/_4_student_effort/_1_Phone_Book/PhoneBook.java
 create mode 100644 _4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Array.java
 create mode 100644 _4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Incercare.java
 create mode 100644 _4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/SecretMessage.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Currency.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/ExchangeDesk.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Ron.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/USD.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/Boot.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/ColorDoesNotMatchException.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/Heels.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/Pair.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/RunnableClass.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/Running.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/Shoe.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_2_pairss/SizeDoNotMatchException.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/Example.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericList.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericNode.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericList.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericNode.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ArrayIterator.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/Example1.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericList.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericNode.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IArrayIterator.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericList.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericNode.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ListIterator.java
 create mode 100644 _5_generics/src/main/java/code/_4_student_effort/_5_genericc_binary_search/Main.java
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_0_activity/GenericsActivity$BubleSort.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_0_activity/GenericsActivity.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_1_pecs/Pecs.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_2_heap_pollution/HeapPollution.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/Node.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/Node2.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/TypeErrasure.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/ClothingItem.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Glove.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/GlovesAndSocksExample.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Pair.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/PairDoesNotMatch.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Sock.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Currency.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDesk.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDeskChallenge.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDeskConversionException.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Ron.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Usd.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Boot.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/ColorsDoNotMatchException.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Heels.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Pair.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/PairsChallenge.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Running.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Shoe.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/SizesDoNotMatchException.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericLinkedListChallenge.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericList.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericNode.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/IGenericList.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/IGenericNode.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/ArrayIterator.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/GenericIteratorChallenge.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/Glove.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/IArrayIterator.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/Sock.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_5_generic_binary_search/ArrayNotSortedException.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_2_challenge/_5_generic_binary_search/GenericBinarySearchChallenge.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_3_in_class/Main.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/Main.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/Currency.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/ExchangeDesk.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/Ron.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/USD.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Boot.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/ColorDoesNotMatchException.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Heels.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Pair.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/RunnableClass.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Running.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Shoe.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/SizeDoNotMatchException.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/Example.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/GenericList.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/GenericNode.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/IGenericList.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/IGenericNode.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/ArrayIterator.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/Example1.class
 create mode 100644 _5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/IArrayIterator.class
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_1_lleaders/LeadersChalllenge.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_2_pascall_triangle/PascalTriangleChallenge.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_3_bell_triangle/BellTriangleChallenge.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_5_merge_sorted_list/MergeSortedLists.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_6_package_spiral/MatrixSpiral.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/Challenge.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTable.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTableImpl.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/Challenge.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayList.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayListImpl.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_9_My_Set/Challenge.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySet.java
 create mode 100644 _6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySetImpl.java
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_0_activity/Activity.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/Main.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_10_deque_interface/DequeExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_11_set_interface/SetExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_12_map_interface/MapExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_13_equals_hashcode/EqualsAndHashCodeExample$BadStudent.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_13_equals_hashcode/EqualsAndHashCodeExample$GoodStudent.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_13_equals_hashcode/EqualsAndHashCodeExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_14_ordering/OrderingExample$Person$1.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_14_ordering/OrderingExample$Person.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_14_ordering/OrderingExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_15_unmodifiable_collection/UnmodifiableCollectionExample$Person.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_15_unmodifiable_collection/UnmodifiableCollectionExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_1_checked_list/CheckedList.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_2_remove_in_loop/RemoveInLoop.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_3_fail_fast_iterator/FailFastIterator.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_4_fail_safe_iterator/FailSafeIterator.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_5_list_iterator/ListIteratorExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_6_spliterator/SpliteratorExample$RemainingConsumer.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_6_spliterator/SpliteratorExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_7_collection_interface/CollectionExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_8_list_interface/ListExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_9_queue_interface/QueueExample$Student.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_9_queue_interface/QueueExample$StudentGradeComparator.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_9_queue_interface/QueueExample$StudentHeightComparator.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_9_queue_interface/QueueExample$StudentNameComparator.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_1_study/_9_queue_interface/QueueExample.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/Main.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_1_leaders/LeadersChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_2_pascal_triangle/PascalTriangleChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_3_bell_triangle/BellTriangleChllenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_4_zig_zag/ZigZagChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_5_merge_sorted_lists/MergeSortedListsChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_6_matrix_spiral/MatrixSpiralChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTable.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTableChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTableImpl.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayList.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayListChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayListImpl.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySet.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySetChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySetImpl.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_3_in_class/Main.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/Main.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_1_lleaders/LeadersChalllenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_2_pascall_triangle/PascalTriangleChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_3_bell_triangle/BellTriangleChallenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_5_merge_sorted_list/MergeSortedLists.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_6_package_spiral/MatrixSpiral.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/Challenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/MyHashhTable.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/MyHashhTableImpl.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/Challenge.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/MyArrayList.class
 create mode 100644 _6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/MyArrayListImpl.class
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/Challenge.java
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitRunnable.java
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitThread.java
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/BankAccount.java
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/Challenge.java
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/TransactionThread.java
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Challenge.java
 create mode 100644 _7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Player.java
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/Main.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_1_contention/ContentionExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_1_contention/MyThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/Consumer.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/IChannel.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/LackOfCoordinationChannel.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/LackOfCoordinationExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/Producer.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/Consumer.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/GoodCoordinationChannel.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/GoodCoordinationExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/IChannel.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/Producer.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/OnePersonKitchen.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/Person.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/PersonThatNeverFinishesEating.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/StarvationExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/BankAccount.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/IntrinsicLocksExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/TransactionThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/BankAccount.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/LockObjectsExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/TransactionThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/BankAccount.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/DeadlockExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/TransactionThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/BankAccount.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/LivelockExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/TransactionThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_9_executors/ExecutorsExample.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_1_study/_9_executors/Task.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/Main.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitRaceChallenge.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitRunnable.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_2_bank_transactions/BankAccount.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_2_bank_transactions/BankTransactionschallenge.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_2_bank_transactions/TransactionThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_3_rock_paper_scissors/RockPaperScissorsChallenge$Player.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_3_rock_paper_scissors/RockPaperScissorsChallenge.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/hard/_1_dining_philosophers/Chopstick.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/hard/_1_dining_philosophers/DiningPhilosophersChallenge.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/hard/_1_dining_philosophers/Philosopher.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_3_in_class/Main.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/Main.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/Challenge.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/RabbitRunnable.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/RabbitThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/BankAccount.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/Challenge.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/TransactionThread.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_3_rock_paper_scissors/Challenge.class
 create mode 100644 _7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_3_rock_paper_scissors/Player.class

diff --git a/_4_exceptions_io/src/main/java/code/_4_student_effort/_1_Phone_Book/PhoneBook.java b/_4_exceptions_io/src/main/java/code/_4_student_effort/_1_Phone_Book/PhoneBook.java
new file mode 100644
index 000000000..de9c141be
--- /dev/null
+++ b/_4_exceptions_io/src/main/java/code/_4_student_effort/_1_Phone_Book/PhoneBook.java
@@ -0,0 +1,24 @@
+package code._4_student_effort._1_Phone_Book;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.util.Scanner;
+
+public class PhoneBook
+{
+    public static void main(String[] args)
+    {
+        String cautat="abc";
+        try{
+            readPhoneBook("Fisier");
+        }catch (FileNotFoundException e)
+        {
+            e.printStackTrace();
+        }
+    }
+    public static void readPhoneBook(String file) throws FileNotFoundException
+    {
+        Scanner s = new Scanner(new BufferedReader(new FileReader(file)));
+    }
+}
diff --git a/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Array.java b/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Array.java
new file mode 100644
index 000000000..0efed36be
--- /dev/null
+++ b/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Array.java
@@ -0,0 +1,20 @@
+package code._4_student_effort._2_incercare;
+
+public class Array {
+    public static void main(String[] args) {
+        try {
+            int[] v = new int[]{1, 2, 3};
+            citireArray(v);
+        } catch (ArrayIndexOutOfBoundsException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void citireArray(int[] v) throws ArrayIndexOutOfBoundsException {
+        try {
+            System.out.println(v[v.length + 1]);
+        } finally {
+            System.out.println("degeaba");
+        }
+    }
+}
diff --git a/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Incercare.java b/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Incercare.java
new file mode 100644
index 000000000..3c1d2272d
--- /dev/null
+++ b/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/Incercare.java
@@ -0,0 +1,11 @@
+package code._4_student_effort._2_incercare;
+
+public class Incercare
+{
+    public static void main(String[] args)
+    {
+
+        int []v=new int[]{1,2,3};
+        System.out.println(v[3]);
+    }
+}
diff --git a/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/SecretMessage.java b/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/SecretMessage.java
new file mode 100644
index 000000000..2e62ae7ac
--- /dev/null
+++ b/_4_exceptions_io/src/main/java/code/_4_student_effort/_2_incercare/SecretMessage.java
@@ -0,0 +1,24 @@
+package code._4_student_effort._2_incercare;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.util.Scanner;
+
+public class SecretMessage
+{
+    public static void main(String[] args)
+    {
+        try
+        {
+            Citire("Fisier");
+        } catch (FileNotFoundException e)
+        {
+            e.printStackTrace();
+        }
+    }
+    public static void Citire(String file) throws FileNotFoundException
+    {
+        Scanner s = new Scanner(new BufferedReader(new FileReader(file)));
+    }
+}
diff --git a/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericLinkedListChallenge.java b/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericLinkedListChallenge.java
index bff2e8a3a..152337647 100644
--- a/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericLinkedListChallenge.java
+++ b/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericLinkedListChallenge.java
@@ -4,12 +4,12 @@ public class GenericLinkedListChallenge {
 
     public static void main(String[] args) {
         String rootValue = "a";
-        GenericList<String> list = new GenericList<>(rootValue);
+      /*  GenericList<String> list = new GenericList<>(rootValue);
 
         for (int i = 1; i < 10; i++) {
             list.insert(String.valueOf(Character.valueOf((char) (rootValue.charAt(0) + i))));
         }
-        list.println();
+        list.println();*/
 
     }
 }
diff --git a/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericList.java b/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericList.java
index 7a5075a7e..bf794bd2d 100644
--- a/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericList.java
+++ b/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/GenericList.java
@@ -4,9 +4,10 @@ public class GenericList<T> implements IGenericList<T> {
 
     private IGenericNode<T> root;
 
-    public GenericList(T rootValue) {
+    public GenericList( IGenericNode<T> root1) {
         this.root = new GenericNode<>();
-        this.root.setValue(rootValue);
+        this.root.setValue(root1.getValue());
+        this.root.setNext(root1.getNext());
     }
 
     @Override
diff --git a/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/IGenericList.java b/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/IGenericList.java
index 996b41e0c..aea376644 100644
--- a/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/IGenericList.java
+++ b/_5_generics/src/main/java/code/_2_challenge/_3_generic_linked_list/IGenericList.java
@@ -1,7 +1,11 @@
 package code._2_challenge._3_generic_linked_list;
 
+import code._4_student_effort._4_genericc_iterator.IGenericNode;
+
 public interface IGenericList<T> {
     void insert(T element);
 
     void println();
+
+    IGenericNode<T> getRoot();
 }
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Currency.java b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Currency.java
new file mode 100644
index 000000000..848f61f7a
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Currency.java
@@ -0,0 +1,24 @@
+package code._4_student_effort._1_exchange_desk;
+
+public abstract class Currency
+{
+    private double units;
+
+    public Currency()
+    {
+        units=0;
+    }
+    public Currency(double units)
+    {
+        this.units=units;
+    }
+    public void setUnits(double units)
+    {
+        this.units=units;
+    }
+    public double getUnits()
+    {
+        return units;
+    }
+
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/ExchangeDesk.java b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/ExchangeDesk.java
new file mode 100644
index 000000000..918f5d614
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/ExchangeDesk.java
@@ -0,0 +1,6 @@
+package code._4_student_effort._1_exchange_desk;
+
+public class ExchangeDesk
+{
+
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Ron.java b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Ron.java
new file mode 100644
index 000000000..21b936d1d
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/Ron.java
@@ -0,0 +1,27 @@
+package code._4_student_effort._1_exchange_desk;
+
+public class Ron extends Currency
+{
+    public Ron()
+    {
+        super();
+    }
+    public Ron(double units)
+    {
+        super(units);
+    }
+
+    @Override
+    public void setUnits(double units)
+    {
+        super.setUnits(units);
+    }
+    public double getUnits()
+    {
+        return super.getUnits();
+    }
+    public String toString()
+    {
+        return this.getUnits()+"lei";
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/USD.java b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/USD.java
new file mode 100644
index 000000000..ac7538052
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_1_exchange_desk/USD.java
@@ -0,0 +1,21 @@
+package code._4_student_effort._1_exchange_desk;
+
+public class USD extends Currency
+{
+    public USD()
+    {
+        super();
+    }
+    public USD(double units)
+    {
+        super(units);
+    }
+    public void setUnits(double units)
+    {
+        super.setUnits(units);
+    }
+    public String toString()
+    {
+        return getUnits()+"USD";
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Boot.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Boot.java
new file mode 100644
index 000000000..0465b986c
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Boot.java
@@ -0,0 +1,26 @@
+package code._4_student_effort._2_pairss;
+
+public class Boot implements Shoe
+{
+    private double size;
+    private String color;
+
+    public Boot(double size,String color)
+    {
+        this.size=size;
+        this.color=color;
+    }
+    public Boot()
+    {
+        this(0,"");
+    }
+    public double getSize()
+    {
+        return size;
+    }
+    public String getColor()
+    {
+        return color;
+    }
+
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/ColorDoesNotMatchException.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/ColorDoesNotMatchException.java
new file mode 100644
index 000000000..3c7bd46df
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/ColorDoesNotMatchException.java
@@ -0,0 +1,9 @@
+package code._4_student_effort._2_pairss;
+
+public class ColorDoesNotMatchException extends RuntimeException
+{
+    public ColorDoesNotMatchException(String message)
+    {
+        super(message);
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Heels.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Heels.java
new file mode 100644
index 000000000..764bb6dbd
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Heels.java
@@ -0,0 +1,25 @@
+package code._4_student_effort._2_pairss;
+
+public class Heels implements Shoe
+{
+    private double size;
+    private String color;
+
+    public Heels(double size,String color)
+    {
+        this.size=size;
+        this.color=color;
+    }
+    public Heels()
+    {
+        this(0,"");
+    }
+    public double getSize()
+    {
+        return size;
+    }
+    public String getColor()
+    {
+        return color;
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Pair.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Pair.java
new file mode 100644
index 000000000..9cfe711a3
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Pair.java
@@ -0,0 +1,31 @@
+package code._4_student_effort._2_pairss;
+
+import java.awt.*;
+
+public class Pair <T extends Shoe>
+{
+    private T firstObject;
+    private T secondObject;
+
+    public Pair(T firstObject,T secondObject)
+    {
+        this.firstObject=firstObject;
+        this.secondObject=secondObject;
+        this.match(firstObject,secondObject);
+    }
+    public void match(T firstObject,T secondObject)
+    {
+        if(!firstObject.getColor().equals(secondObject.getColor()))
+            throw new SizeDoNotMatchException("Size do not martch!");
+        if(firstObject.getSize()!=secondObject.getSize())
+            throw new ColorDoesNotMatchException("Color does not match!");
+    }
+    public T getFirstObject()
+    {
+        return firstObject;
+    }
+    public T getSecondObject()
+    {
+        return secondObject;
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/RunnableClass.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/RunnableClass.java
new file mode 100644
index 000000000..2fb561284
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/RunnableClass.java
@@ -0,0 +1,19 @@
+package code._4_student_effort._2_pairss;
+
+public class RunnableClass
+{
+    public static void main(String[] args) {
+        Running runningShoe1 = new Running(41, "RED");
+        Running runningShoe2 = new Running(41, "RED");
+        Pair<Running> pairOK = new Pair<>(runningShoe1, runningShoe2);
+
+        Boot bootShoe = new Boot(45, "BLACK");
+        //Pair<Running> pairNotOK = new Pair<>(runningShoe1, bootShoe);
+
+
+        Running runningShoe3 = new Running(41, "RED");
+        Running runningShoe4 = new Running(42, "RED");
+        Pair<Running> pair1 = new Pair<>(runningShoe3, runningShoe4);
+
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Running.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Running.java
new file mode 100644
index 000000000..e059aff71
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Running.java
@@ -0,0 +1,26 @@
+package code._4_student_effort._2_pairss;
+
+public class Running implements Shoe
+{
+    private double size;
+    private String color;
+
+    public Running(double size,String color)
+    {
+        this.size=size;
+        this.color=color;
+    }
+
+    public Running()
+    {
+        this(0,"");
+    }
+    public double getSize()
+    {
+        return size;
+    }
+    public String getColor()
+    {
+        return color;
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Shoe.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Shoe.java
new file mode 100644
index 000000000..7cbaf6a8a
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/Shoe.java
@@ -0,0 +1,7 @@
+package code._4_student_effort._2_pairss;
+
+public interface Shoe
+{
+    public double getSize();
+    public String getColor();
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/SizeDoNotMatchException.java b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/SizeDoNotMatchException.java
new file mode 100644
index 000000000..c743f9f31
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_2_pairss/SizeDoNotMatchException.java
@@ -0,0 +1,9 @@
+package code._4_student_effort._2_pairss;
+
+public class SizeDoNotMatchException extends RuntimeException
+{
+    public SizeDoNotMatchException(String message)
+    {
+        super(message);
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/Example.java b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/Example.java
new file mode 100644
index 000000000..932367032
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/Example.java
@@ -0,0 +1,18 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public class Example
+{
+    public static void main(String[] args)
+    {
+        IGenericNode<Integer> node=new GenericNode<Integer>();
+        node.setValue(1);
+        node.setNext(null);
+        IGenericList<Integer> list=new GenericList<Integer>(node);
+        IGenericNode<Integer> node2=new GenericNode<Integer>();
+        node.setValue(2);
+      //  node2.setNext(null);
+        list.insert(node2);
+        list.println();
+
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericList.java b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericList.java
new file mode 100644
index 000000000..bd9ac4bbf
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericList.java
@@ -0,0 +1,37 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public class GenericList<T> implements IGenericList<T>
+{
+    private IGenericNode<T> root;
+
+    public GenericList(IGenericNode<T> node)
+    {
+        root.setValue(node.getValue());
+        root.setNext(node.getNext());
+    }
+    public void insert(IGenericNode<T> node)
+    {
+        IGenericNode<T> cursor=root;
+        while(cursor.getNext()!=null)
+        {
+            cursor=cursor.getNext();
+        }
+        IGenericNode<T> aux=new GenericNode<T>();
+        aux.setValue(node.getValue());
+        aux.setNext(null);
+        cursor.setNext(aux);
+    }
+    public void println()
+    {
+        IGenericNode<T> cursor=root;
+        while(cursor.getNext()!=null)
+        {
+            System.out.println(cursor.getValue());
+            cursor=cursor.getNext();
+        }
+    }
+    public IGenericNode<T> getRoot()
+    {
+        return root;
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericNode.java b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericNode.java
new file mode 100644
index 000000000..19c907092
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/GenericNode.java
@@ -0,0 +1,24 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public class GenericNode<T> implements IGenericNode<T>
+{
+    private T value;
+    private IGenericNode<T> next;
+
+    public T getValue()
+    {
+        return value;
+    }
+    public IGenericNode<T> getNext()
+    {
+        return next;
+    }
+    public void setValue(T value)
+    {
+        this.value=value;
+    }
+    public void setNext(IGenericNode<T> next)
+    {
+        this.next=next;
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericList.java b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericList.java
new file mode 100644
index 000000000..66f889a98
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericList.java
@@ -0,0 +1,8 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public interface IGenericList<T>
+{
+    public void insert(IGenericNode<T> node);
+    public void println();
+    public IGenericNode<T> getRoot();
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericNode.java b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericNode.java
new file mode 100644
index 000000000..5a52b7b97
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_3_genericc_linked_list/IGenericNode.java
@@ -0,0 +1,10 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public interface IGenericNode<T>
+{
+    public T getValue();
+    public void setValue(T value);
+    public IGenericNode<T> getNext();
+    public void setNext(IGenericNode<T> next);
+
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ArrayIterator.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ArrayIterator.java
new file mode 100644
index 000000000..b3d196def
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ArrayIterator.java
@@ -0,0 +1,28 @@
+package code._4_student_effort._4_genericc_iterator;
+
+import java.lang.reflect.Array;
+
+public class ArrayIterator<T> implements IArrayIterator<T>
+{
+    private Integer index;
+    private T [] array;
+
+    public ArrayIterator(T [] array)
+    {
+        index=0;
+        this.array=array;
+    }
+
+    @Override
+    public boolean hasNext()
+    {
+        if(index< array.length)
+            return true;
+        else
+            return false;
+    }
+    public T next()
+    {
+        return array[index++];
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/Example1.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/Example1.java
new file mode 100644
index 000000000..fb79284bc
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/Example1.java
@@ -0,0 +1,16 @@
+package code._4_student_effort._4_genericc_iterator;
+
+public class Example1
+{
+    public static void main(String[] args)
+    {
+        Integer [] arr1=new Integer[4];
+        arr1[0]=0;
+        arr1[1]=1;
+        arr1[2]=2;
+        arr1[3]=3;
+        IArrayIterator<Integer> it=new ArrayIterator<Integer>(arr1);
+        while(it.hasNext())
+            System.out.println(it.next());
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericList.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericList.java
new file mode 100644
index 000000000..72165132d
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericList.java
@@ -0,0 +1,37 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public class GenericList<T> implements IGenericList<T>
+{
+    private IGenericNode<T> root;
+
+    public GenericList(IGenericNode<T> node)
+    {
+        root.setValue(node.getValue());
+        root.setNext(node.getNext());
+    }
+    public void insert(IGenericNode<T> node)
+    {
+        IGenericNode<T> cursor=root;
+        while(cursor.getNext()!=null)
+        {
+            cursor=cursor.getNext();
+        }
+        IGenericNode<T> aux=new GenericNode<T>();
+        aux.setValue(node.getValue());
+        aux.setNext(null);
+        cursor.setNext(aux);
+    }
+    public void println()
+    {
+        IGenericNode<T> cursor=root;
+        while(cursor.getNext()!=null)
+        {
+            System.out.println(cursor.getValue());
+            cursor=cursor.getNext();
+        }
+    }
+    public code._4_student_effort._4_genericc_iterator.IGenericNode<T> getRoot()
+    {
+        return root;
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericNode.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericNode.java
new file mode 100644
index 000000000..19c907092
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/GenericNode.java
@@ -0,0 +1,24 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public class GenericNode<T> implements IGenericNode<T>
+{
+    private T value;
+    private IGenericNode<T> next;
+
+    public T getValue()
+    {
+        return value;
+    }
+    public IGenericNode<T> getNext()
+    {
+        return next;
+    }
+    public void setValue(T value)
+    {
+        this.value=value;
+    }
+    public void setNext(IGenericNode<T> next)
+    {
+        this.next=next;
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IArrayIterator.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IArrayIterator.java
new file mode 100644
index 000000000..08992ce4d
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IArrayIterator.java
@@ -0,0 +1,7 @@
+package code._4_student_effort._4_genericc_iterator;
+
+public interface IArrayIterator<T>
+{
+    public T next();
+    public boolean hasNext();
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericList.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericList.java
new file mode 100644
index 000000000..a34b6bc63
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericList.java
@@ -0,0 +1,8 @@
+package code._4_student_effort._3_genericc_linked_list;
+
+public interface IGenericList<T>
+{
+    public void insert(IGenericNode<T> node);
+    public void println();
+    public code._4_student_effort._4_genericc_iterator.IGenericNode<T> getRoot();
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericNode.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericNode.java
new file mode 100644
index 000000000..dfa92dcce
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/IGenericNode.java
@@ -0,0 +1,10 @@
+package code._4_student_effort._4_genericc_iterator;
+
+public interface IGenericNode<T>
+{
+    public T getValue();
+    public void setValue(T value);
+    public IGenericNode<T> getNext();
+    public void setNext(IGenericNode<T> next);
+
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ListIterator.java b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ListIterator.java
new file mode 100644
index 000000000..88aa3b0d2
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_4_genericc_iterator/ListIterator.java
@@ -0,0 +1,29 @@
+package code._4_student_effort._4_genericc_iterator;
+
+import code._2_challenge._3_generic_linked_list.IGenericList;
+import code._4_student_effort._3_genericc_linked_list.GenericList;
+import code._4_student_effort._3_genericc_linked_list.GenericNode;
+
+public class ListIterator<T> implements IArrayIterator<T>
+{
+    IGenericNode<T> cursor;
+    IGenericList<T> list;
+
+    public ListIterator(IGenericList list1)
+    {
+        list=list1;
+        cursor=list.getRoot();
+    }
+    public boolean hasNext()
+    {
+        cursor=cursor.getNext();
+        if(cursor!=null)
+            return true;
+        else
+            return false;
+    }
+    public T next()
+    {
+        return cursor.getValue();
+    }
+}
diff --git a/_5_generics/src/main/java/code/_4_student_effort/_5_genericc_binary_search/Main.java b/_5_generics/src/main/java/code/_4_student_effort/_5_genericc_binary_search/Main.java
new file mode 100644
index 000000000..8144bdfd0
--- /dev/null
+++ b/_5_generics/src/main/java/code/_4_student_effort/_5_genericc_binary_search/Main.java
@@ -0,0 +1,20 @@
+package code._4_student_effort._5_genericc_binary_search;
+
+public class Main
+{
+    public static void main(String[] args)
+    {
+        Integer [] v=new Integer[10];
+        v[0]=1;
+        v[1]=2;
+        v[2]=3;
+        v[3]=4;
+        v[4]=5;
+        v[5]=6;
+        v[6]=7;
+        v[7]=8;
+        v[8]=9;
+        v[9]=10;
+    }
+    public static T
+}
diff --git a/_5_generics/src/main/java/code/out/production/code/code/_0_activity/GenericsActivity$BubleSort.class b/_5_generics/src/main/java/code/out/production/code/code/_0_activity/GenericsActivity$BubleSort.class
new file mode 100644
index 0000000000000000000000000000000000000000..618205583205dee51b67d9e78615fa2fbc104798
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_0_activity/GenericsActivity.class b/_5_generics/src/main/java/code/out/production/code/code/_0_activity/GenericsActivity.class
new file mode 100644
index 0000000000000000000000000000000000000000..0522e8eb2ad714488a994482ac8ee5a7b1612a5d
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_1_pecs/Pecs.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_1_pecs/Pecs.class
new file mode 100644
index 0000000000000000000000000000000000000000..0e69b33ed12019cc50190be5095025b72cfceb89
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_2_heap_pollution/HeapPollution.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_2_heap_pollution/HeapPollution.class
new file mode 100644
index 0000000000000000000000000000000000000000..65e86304844d4cd9c93f779dd16bdac23d31588e
GIT binary patch
literal 1141
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/Node.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/Node.class
new file mode 100644
index 0000000000000000000000000000000000000000..33b77ac6bd3f7178472e62ca6a85cac8918ccc57
GIT binary patch
literal 665
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/Node2.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/Node2.class
new file mode 100644
index 0000000000000000000000000000000000000000..4fe1c98affaec321f60c77b8fa1f44c69a7bcff8
GIT binary patch
literal 674
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/TypeErrasure.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_3_type_errasure/TypeErrasure.class
new file mode 100644
index 0000000000000000000000000000000000000000..2b611946ee454a323dfe843437875714dd9d25e6
GIT binary patch
literal 441
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/ClothingItem.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/ClothingItem.class
new file mode 100644
index 0000000000000000000000000000000000000000..97472a544b1c665413e60cbea63569c7d29e3dbc
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Glove.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Glove.class
new file mode 100644
index 0000000000000000000000000000000000000000..e73e7cdc69579ad4c7869a9ae07f1ad9ed7de0f7
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/GlovesAndSocksExample.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/GlovesAndSocksExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..2d7f1e85296115d67d410f9d3a295d0563e8d0e7
GIT binary patch
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HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Pair.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Pair.class
new file mode 100644
index 0000000000000000000000000000000000000000..3b562e0f55d115b93e8c2643abf95ad68f219c42
GIT binary patch
literal 1372
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/PairDoesNotMatch.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/PairDoesNotMatch.class
new file mode 100644
index 0000000000000000000000000000000000000000..e0391d1de29a3de0c9ca06dcb7439d7910830d5d
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Sock.class b/_5_generics/src/main/java/code/out/production/code/code/_1_study/_4_gloves_and_socks/Sock.class
new file mode 100644
index 0000000000000000000000000000000000000000..72f498e74739f9a1eb62b426bb1431978817673c
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Currency.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Currency.class
new file mode 100644
index 0000000000000000000000000000000000000000..366747f98cb4600afe615a6c4efd1cd528e0bc6c
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDesk.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDesk.class
new file mode 100644
index 0000000000000000000000000000000000000000..f280e85f60d7c097e4d43ed247e440eee533c93a
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDeskChallenge.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDeskChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..9c40e748a4a8200a781ef930282b6bffa4b570c5
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDeskConversionException.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/ExchangeDeskConversionException.class
new file mode 100644
index 0000000000000000000000000000000000000000..ba8388f4d46dbdf906b535faafebdf091b2935df
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Ron.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Ron.class
new file mode 100644
index 0000000000000000000000000000000000000000..2cafe0db4ffa8200481ad9b89c90533541da45ce
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Usd.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_1_exchange_desk/Usd.class
new file mode 100644
index 0000000000000000000000000000000000000000..e98d1331b387633d0c32f3b66c227fe7114c1adb
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Boot.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Boot.class
new file mode 100644
index 0000000000000000000000000000000000000000..2666a5e7001d15c5e73d75491b69b308c5564bba
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/ColorsDoNotMatchException.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/ColorsDoNotMatchException.class
new file mode 100644
index 0000000000000000000000000000000000000000..42def7b4f91dfe5f2966060f0dceeb3e7e6d9925
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Heels.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Heels.class
new file mode 100644
index 0000000000000000000000000000000000000000..1473fa7a52a79e2bf99c869d71d6bff151c32ed8
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Pair.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Pair.class
new file mode 100644
index 0000000000000000000000000000000000000000..6909e02f83307bbdd45bd2155d240b9df60dd030
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/PairsChallenge.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/PairsChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..2e6c5039b76695adccf4dad336e4e744f0767355
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Running.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Running.class
new file mode 100644
index 0000000000000000000000000000000000000000..b1fa487b9358f62b5e83b6bda952d41c167c31fa
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Shoe.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/Shoe.class
new file mode 100644
index 0000000000000000000000000000000000000000..115eb71104eef37cd7510bf6bb396602190bf96a
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/SizesDoNotMatchException.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_2_pairs/SizesDoNotMatchException.class
new file mode 100644
index 0000000000000000000000000000000000000000..172a68b41a85f212aea69ce21ea288daa3c18361
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericLinkedListChallenge.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericLinkedListChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..4339d6e10805fae1748d11872239b65cf4fa9c1b
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericList.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericList.class
new file mode 100644
index 0000000000000000000000000000000000000000..56fdbbe39535d84a1e9d0e40ca3079c7d4e2dbfa
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericNode.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/GenericNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..2e22d3f3f12c6d7e5ab40b6dbe278e088e68392b
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/IGenericList.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/IGenericList.class
new file mode 100644
index 0000000000000000000000000000000000000000..9c99556720c9d2c4d667983c3f6ad12d8c8ac181
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/IGenericNode.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_3_generic_linked_list/IGenericNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..596e8cf4265b902b471b7de0188b0dc706b928c6
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/ArrayIterator.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/ArrayIterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..063ef24839e505519f0628093e844837f26daf93
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/GenericIteratorChallenge.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/GenericIteratorChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..4beb0352c254393dd5239f82045e0757ad94ffdc
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/Glove.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/Glove.class
new file mode 100644
index 0000000000000000000000000000000000000000..0b416d379afe2df69e5a639eef3333832818e753
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/IArrayIterator.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/IArrayIterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..648ff100996b7a69e8dd10d727e3bcf5702bc859
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/Sock.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_4_generic_iterator/Sock.class
new file mode 100644
index 0000000000000000000000000000000000000000..797ca4fcaac3d6c413b2bfb6cc6f1c8927526d0a
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_5_generic_binary_search/ArrayNotSortedException.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_5_generic_binary_search/ArrayNotSortedException.class
new file mode 100644
index 0000000000000000000000000000000000000000..e6c912ccdb8770687364776cc44a42bfacda0551
GIT binary patch
literal 447
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_5_generic_binary_search/GenericBinarySearchChallenge.class b/_5_generics/src/main/java/code/out/production/code/code/_2_challenge/_5_generic_binary_search/GenericBinarySearchChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..f977cf1feebfe22efe0613c8fb26af396d583420
GIT binary patch
literal 3399
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_3_in_class/Main.class b/_5_generics/src/main/java/code/out/production/code/code/_3_in_class/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..e3969b684995b781ae0a4797a6d6bad610dc5d19
GIT binary patch
literal 389
zcmZutJx{|h5Pg@V4GD!p%g4;tf`kXgRxC(N0fwS143T53;3{>bB;|iGAu;d+_)&;+
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C^GbLC

literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/Main.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..7990d91a186bac917a5af3640b9dc74948dbe756
GIT binary patch
literal 401
zcmaJ-!AiqG5Ph4ZjfvH2D_+Edw^qTucx&+@c#3+c<l-T0(rw(5ZeY9Ve|Zu-_yK;D
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/Currency.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/Currency.class
new file mode 100644
index 0000000000000000000000000000000000000000..1981024509898fd0b65fe9e81bdbe9ba2999987f
GIT binary patch
literal 628
zcmb7>!A`<Z5Jm5UQlJ)4RCMb~WMS2~)3AZCBDzr7Hl;kEifvL_qhDoAG$t<m06)rj
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HlCG^U{~Tmk

literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/ExchangeDesk.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/ExchangeDesk.class
new file mode 100644
index 0000000000000000000000000000000000000000..e8d0a1b278beedbdf24bc940961060e0751e38c2
GIT binary patch
literal 341
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/Ron.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/Ron.class
new file mode 100644
index 0000000000000000000000000000000000000000..888d4a3346442b66eb34505d217827c42668b355
GIT binary patch
literal 1178
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/USD.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_1_exchange_desk/USD.class
new file mode 100644
index 0000000000000000000000000000000000000000..3ef9c9ea9a94900aa644a073278ab11b7dad9cd5
GIT binary patch
literal 1112
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Boot.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Boot.class
new file mode 100644
index 0000000000000000000000000000000000000000..3280c5e571c20d91e5f574d0144804548cd0fb20
GIT binary patch
literal 747
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/ColorDoesNotMatchException.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/ColorDoesNotMatchException.class
new file mode 100644
index 0000000000000000000000000000000000000000..5fc8a22182f478cc169b6429293504189ae0945b
GIT binary patch
literal 443
zcmbtQO-sW-6r8PTQe(AR(1RE8<_8#%-coz1dWt<*={0QAZMu@|mfel`w>$|R`~m(b
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Heels.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Heels.class
new file mode 100644
index 0000000000000000000000000000000000000000..58ff05165f1b7229f080a19fcb747bc94fc10632
GIT binary patch
literal 750
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literal 0
HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Pair.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Pair.class
new file mode 100644
index 0000000000000000000000000000000000000000..c39b61fe3e0ad83a0e8ed2250be75a2360ad5534
GIT binary patch
literal 1677
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/RunnableClass.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/RunnableClass.class
new file mode 100644
index 0000000000000000000000000000000000000000..029d1ec5b068eb094803f6d575df5955cd3bb724
GIT binary patch
literal 1306
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Running.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Running.class
new file mode 100644
index 0000000000000000000000000000000000000000..ffdf97150fa64931a833d7a97ced080c5c269883
GIT binary patch
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HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Shoe.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/Shoe.class
new file mode 100644
index 0000000000000000000000000000000000000000..2d9036d7cfdffbbcd4bbb0e4bbedadd901e0ea00
GIT binary patch
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HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/SizeDoNotMatchException.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_2_pairss/SizeDoNotMatchException.class
new file mode 100644
index 0000000000000000000000000000000000000000..04a88d16d6482ba525451e9ba700c62897272df1
GIT binary patch
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HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/Example.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/Example.class
new file mode 100644
index 0000000000000000000000000000000000000000..f8e552bec73427b117973747b1d8e1ab98716cd5
GIT binary patch
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HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/GenericList.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/GenericList.class
new file mode 100644
index 0000000000000000000000000000000000000000..e112e697d3bb9bb51ccc289b05abb49639d9bbf9
GIT binary patch
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HcmV?d00001

diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/GenericNode.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/GenericNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..055b2b36d3bae09c137e7980832df03162853431
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/IGenericList.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/IGenericList.class
new file mode 100644
index 0000000000000000000000000000000000000000..3e83421179df04e3e65833734425052108bffc4e
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/IGenericNode.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_3_genericc_linked_list/IGenericNode.class
new file mode 100644
index 0000000000000000000000000000000000000000..4491a15c8b0978b5484b11237b64af57a13a2bdd
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/ArrayIterator.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/ArrayIterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..6706dc2f109b545ddf2f4d4350fca1c6d33a91b9
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/Example1.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/Example1.class
new file mode 100644
index 0000000000000000000000000000000000000000..4102eb379a6eb14e8ad4a8b5d8f5288c0e33b974
GIT binary patch
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diff --git a/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/IArrayIterator.class b/_5_generics/src/main/java/code/out/production/code/code/_4_student_effort/_4_genericc_iterator/IArrayIterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..05f8ad4db296a33e062d1c8243ba67c4bc8dcaa9
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/_4_student_effort/_1_lleaders/LeadersChalllenge.java b/_6_collections/src/main/java/code/_4_student_effort/_1_lleaders/LeadersChalllenge.java
new file mode 100644
index 000000000..d3e3dcc4f
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_1_lleaders/LeadersChalllenge.java
@@ -0,0 +1,35 @@
+package code._4_student_effort._1_lleaders;
+
+import java.util.*;
+
+public class LeadersChalllenge
+{
+    public static void main(String[] args)
+    {
+        List<Integer> list = Arrays.asList(3, 5, 9, 2, 4, 8, 7, 6); //9,8,7,6 are leaders
+        findLeaders(list);
+        List<Integer> leadersList=new ArrayList<>();
+        leadersList=findLeaders(list);
+        afisare(leadersList);
+    }
+    public static List<Integer> findLeaders(List<Integer> list)
+    {
+        List<Integer> leadersList=new ArrayList<>();
+        for(int i=0;i< list.size();i++)
+        {
+            boolean isLeader=true;
+            for(int j=i+1;j<list.size();j++)
+                if(list.get(i)<list.get(j))
+                    isLeader=false;
+            if(isLeader)
+                leadersList.add(list.get(i));
+        }
+        return leadersList;
+    }
+    public static void afisare(List<Integer> list)
+    {
+        ListIterator<Integer> iterator1= list.listIterator();
+        while(iterator1.hasNext())
+            System.out.println(iterator1.next()+" is a leader");
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_2_pascall_triangle/PascalTriangleChallenge.java b/_6_collections/src/main/java/code/_4_student_effort/_2_pascall_triangle/PascalTriangleChallenge.java
new file mode 100644
index 000000000..460d73f0b
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_2_pascall_triangle/PascalTriangleChallenge.java
@@ -0,0 +1,46 @@
+package code._4_student_effort._2_pascall_triangle;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PascalTriangleChallenge
+{
+    public static void main(String[] args)
+    {
+        List<List<Integer>> list=generatePascalTriangle(8);
+        afisare(list);
+
+    }
+    public static List<List<Integer>> generatePascalTriangle(int n)
+    {
+        List<List<Integer>> triangle=new ArrayList<>();
+        for(int i=0;i<n;i++)
+        {
+            triangle.add(new ArrayList<>());
+            triangle.get(i).add(1);
+            if((i!=0)&&(i!=1))
+            {
+                if (triangle.get(i - 1).size() >= 2)
+                {
+                    for (int k = 0; k < triangle.get(i - 1).size() - 1; k++)
+                    {
+                        Integer sum = triangle.get(i - 1).get(k) + triangle.get(i - 1).get(k + 1);
+                        triangle.get(i).add(sum);
+                    }
+                }
+            }
+            if(i!=0)
+                triangle.get(i).add(1);
+        }
+        return triangle;
+    }
+    public static void afisare(List<List<Integer>> list)
+    {
+        for(int i=0;i<list.size();i++)
+        {
+            for (int j = 0; j < list.get(i).size(); j++)
+                System.out.print(list.get(i).get(j) + "  ");
+            System.out.println("");
+        }
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_3_bell_triangle/BellTriangleChallenge.java b/_6_collections/src/main/java/code/_4_student_effort/_3_bell_triangle/BellTriangleChallenge.java
new file mode 100644
index 000000000..99794cc37
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_3_bell_triangle/BellTriangleChallenge.java
@@ -0,0 +1,43 @@
+package code._4_student_effort._3_bell_triangle;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class BellTriangleChallenge
+{
+    public static void main(String[] args)
+    {
+        List<List<Integer>> list=generateBellTriangle(5);
+        afisare(list);
+    }
+    public static List<List<Integer>> generateBellTriangle(Integer n)
+    {
+        List<List<Integer>> triangle=new ArrayList<>();
+        for(int i=0;i<n;i++)
+        {
+            triangle.add(new ArrayList<>());
+            if (i == 0)
+                triangle.get(i).add(1);
+            if(i!=0)
+            {
+                triangle.get(i).add(triangle.get(i-1).get(triangle.get(i-1).size()-1));
+                for(int j=0;j<triangle.get(i-1).size();j++)
+                {
+                    Integer sum;
+                    sum=triangle.get(i-1).get(j)+triangle.get(i).get(j);
+                    triangle.get(i).add(sum);
+                }
+            }
+        }
+        return triangle;
+    }
+    public static void afisare(List<List<Integer>> list)
+    {
+        for(int i=0;i<list.size();i++)
+        {
+            for(int j=0;j<list.get(i).size();j++)
+                System.out.print(list.get(i).get(j)+"  ");
+            System.out.println("");
+        }
+        }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_5_merge_sorted_list/MergeSortedLists.java b/_6_collections/src/main/java/code/_4_student_effort/_5_merge_sorted_list/MergeSortedLists.java
new file mode 100644
index 000000000..d16609722
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_5_merge_sorted_list/MergeSortedLists.java
@@ -0,0 +1,53 @@
+package code._4_student_effort._5_merge_sorted_list;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.util.Arrays.asList;
+
+public class MergeSortedLists
+{
+    public static void main(String[] args)
+    {
+        List<Integer> list1 = asList(1, 2, 3, 4, 5,12,13,13);
+        List<Integer> list2 = asList(3, 4, 5, 6, 7, 8, 9, 10,11,23);
+        List<Integer> list3 = mergeSortedLists(list1,list2);
+        afisare(list3);
+    }
+    public static List<Integer> mergeSortedLists(List<Integer> list1,List<Integer> list2)
+    {
+        List<Integer> list=new ArrayList<>();
+        Integer index1=0;
+        Integer index2=0;
+        while(list.size()!=list1.size()+list2.size() && index1!=list1.size() && index2!=list2.size())
+        {
+            if(list1.get(index1)<list2.get(index2))
+            {
+                list.add(list1.get(index1));
+                index1++;
+            }
+            else
+            {
+                list.add(list2.get(index2));
+                index2++;
+            }
+        }
+        System.out.println(index1+" "+index2);
+        if(index1==list1.size())
+        {
+            for(int j=index2;j<list2.size();j++)
+                list.add(list2.get(j));
+        }
+        if(index2==list2.size())
+        {
+            for(int j=index1;j<list1.size();j++)
+                list.add(list2.get(j));
+        }
+        return list;
+    }
+    public static void afisare(List<Integer> list)
+    {
+        for(int i=0;i<list.size();i++)
+            System.out.print(list.get(i)+" , ");
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_6_package_spiral/MatrixSpiral.java b/_6_collections/src/main/java/code/_4_student_effort/_6_package_spiral/MatrixSpiral.java
new file mode 100644
index 000000000..5952f4625
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_6_package_spiral/MatrixSpiral.java
@@ -0,0 +1,60 @@
+package code._4_student_effort._6_package_spiral;
+
+public class MatrixSpiral
+{
+    public static void main(String[] args)
+    {
+        Integer [][]v=new Integer[4][4];
+        v[0][0]=0;
+        v[0][1]=1;
+        v[0][2]=2;
+        v[0][3]=3;
+        v[1][0]=4;
+        v[1][1]=5;
+        v[1][2]=6;
+        v[1][3]=7;
+        v[2][0]=8;
+        v[2][1]=9;
+        v[2][2]=10;
+        v[2][3]=11;
+        v[3][0]=12;
+        v[3][1]=13;
+        v[3][2]=14;
+        v[3][3]=15;
+        afisareNormala(v);
+        System.out.println("-------------------");
+        afisareSpirala(v);
+    }
+    public static void afisareSpirala(Integer [][] v)
+    {
+        boolean ok=true;
+        Integer n=v.length;
+        Integer index=0;
+        while(ok)
+        {
+            ok=false;
+            for(int j=index;j<n-index;j++)
+            {System.out.print(v[index][j]+" ");
+                ok=true;}
+            for(int i=index+1;i<n-index-1;i++)
+            { System.out.print(v[i][n-index-1]+" ");
+                ok=true;}
+            for(int j=n-index-1;j>=index;j--)
+            {System.out.print(v[n-index-1][j]+" ");
+                ok=true;}
+            for(int i=n-index-2;i>=index+1;i--)
+            {System.out.print(v[i][index]+" ");
+                ok=true;}
+            index++;
+        }
+    }
+    public static void afisareNormala(Integer [][] v)
+    {
+        for(int i=0;i<v.length;i++)
+        {
+            for(int j=0;j<v.length;j++)
+                System.out.print(v[i][j]+ " ");
+            System.out.println("");
+        }
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/Challenge.java b/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/Challenge.java
new file mode 100644
index 000000000..ada91443b
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/Challenge.java
@@ -0,0 +1,26 @@
+package code._4_student_effort._7_my_hashhtable;
+
+public class Challenge <K,V>
+{
+    public static void main(String[] args)
+    {
+        MyHashhTable<Integer,String> map=new MyHashhTableImpl<Integer,String>();
+        map=createMap();
+        afisare(map);
+    }
+    public static MyHashhTable<Integer,String> createMap()
+    {
+        Integer[] a=new Integer[]{1,2,3};
+        String[] s=new String[]{"unu","doi","trei"};
+        MyHashhTable<Integer,String> map=new MyHashhTableImpl<Integer,String>();
+        map.put(a[0],s[0]);
+        map.put(a[1],s[1]);
+        map.put(a[2],s[2]);
+        return map;
+    }
+    public static void afisare(MyHashhTable<Integer,String> map)
+    {
+        for(int i=0;i<map.size();i++)
+            System.out.println(map.get(i+1));
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTable.java b/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTable.java
new file mode 100644
index 000000000..971fca251
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTable.java
@@ -0,0 +1,10 @@
+package code._4_student_effort._7_my_hashhtable;
+
+public interface MyHashhTable<K,V>
+{
+    public V get(K key);
+    public void put(K key, V value);
+    public void remove(K key);
+    public boolean containsKey(K key);
+    public int size();
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTableImpl.java b/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTableImpl.java
new file mode 100644
index 000000000..9c3283c53
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_7_my_hashhtable/MyHashhTableImpl.java
@@ -0,0 +1,32 @@
+package code._4_student_effort._7_my_hashhtable;
+
+public class MyHashhTableImpl<K,V> implements MyHashhTable<K,V>
+{
+    private Object[] values = new Object[Integer.MAX_VALUE / 100];
+    private int nrOfElements = 0;
+
+    public V get(K key)
+    {
+        return (V) values[key.hashCode()];
+    }
+    public void put(K key, V value)
+    {
+        values[key.hashCode()]=value;
+        nrOfElements++;
+    }
+    public void remove(K key)
+    {
+        values[key.hashCode()]=null;
+    }
+    public boolean containsKey(K key)
+    {
+        if(values[key.hashCode()]!=null)
+            return true;
+        else
+            return true;
+    }
+    public int size()
+    {
+        return nrOfElements;
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/Challenge.java b/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/Challenge.java
new file mode 100644
index 000000000..ec44d7ce5
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/Challenge.java
@@ -0,0 +1,17 @@
+package code._4_student_effort._8_My_ArrayList;
+
+public class Challenge
+{
+    public static void main(String[] args)
+    {
+        MyArrayList<Integer> list=new MyArrayListImpl<Integer>();
+        list.add(1);
+        list.add(2);
+        list.add(3);
+        list.set(1,0);
+        for(int i=0;i<list.size();i++)
+        {
+            System.out.print(list.get(i)+ "  ");
+        }
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayList.java b/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayList.java
new file mode 100644
index 000000000..a20bbc0e0
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayList.java
@@ -0,0 +1,10 @@
+package code._4_student_effort._8_My_ArrayList;
+
+public interface MyArrayList<T>
+{
+    public void add(T e);
+    public void remove(T e);
+    public T get(int index);
+    public void set(int index,T e);
+    public int size();
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayListImpl.java b/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayListImpl.java
new file mode 100644
index 000000000..daeaf69c9
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_8_My_ArrayList/MyArrayListImpl.java
@@ -0,0 +1,36 @@
+package code._4_student_effort._8_My_ArrayList;
+
+import java.util.Arrays;
+
+public class MyArrayListImpl<T> implements MyArrayList<T>
+{
+    private Object[] list=new Object[0];
+
+    public void add(T e)
+    {
+        list= Arrays.copyOf(list,list.length+1);
+        list[list.length-1]=e;
+    }
+    public void remove(T e)
+    {
+        for(int i=0;i<list.length;i++)
+        {
+            if(list[i].equals(e))
+            {
+                System.arraycopy(list,i+1,list,i,list.length-i-1);
+            }
+        }
+    }
+    public T get(int index)
+    {
+        return (T) list[index];
+    }
+    public void set(int index,T e)
+    {
+        list[index]=e;
+    }
+    public int size()
+    {
+        return list.length;
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/Challenge.java b/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/Challenge.java
new file mode 100644
index 000000000..f06573c3f
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/Challenge.java
@@ -0,0 +1,9 @@
+package code._4_student_effort._9_My_Set;
+
+public class Challenge
+{
+    public static void main(String[] args)
+    {
+
+    }
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySet.java b/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySet.java
new file mode 100644
index 000000000..7d6456029
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySet.java
@@ -0,0 +1,11 @@
+package code._4_student_effort._9_My_Set;
+
+public interface MySet<T>
+{
+    public void add(T e);
+    public void remove(T e);
+    public T get(int index);
+    public void set(int index,T e);
+    public int size();
+    public boolean contains(T e);
+}
diff --git a/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySetImpl.java b/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySetImpl.java
new file mode 100644
index 000000000..327dffcd7
--- /dev/null
+++ b/_6_collections/src/main/java/code/_4_student_effort/_9_My_Set/MySetImpl.java
@@ -0,0 +1,48 @@
+package code._4_student_effort._9_My_Set;
+
+import java.util.Arrays;
+
+public class MySetImpl<T> implements MySet<T>
+{
+    private Object[] list=new Object[0];
+
+    public void add(T e)
+    {
+        boolean ok=true;
+        for(int i=0;i<list.length;i++)
+            if(list[i].equals(e))
+                ok=false;
+        if(ok==true)
+        {
+            list = Arrays.copyOf(list, list.length + 1);
+            list[list.length - 1] = e;
+        }
+    }
+    public void remove(T e)
+    {
+        for(int i=0;i<list.length;i++)
+        {
+            if(list[i].equals(e))
+                System.arraycopy(list,i+1,list,i,list.length-i-1);
+        }
+    }
+    public T get(int index)
+    {
+        return list[index];
+    }
+    public void set(int index,T e)
+    {
+        list[index]=e;
+    }
+    public int size()
+    {
+        return list.length;
+    }
+    public boolean contains(T e)
+    {
+        for(int i=0;i<list.length;i++)
+            if(list[i].equals(e))
+                return true;
+        return false;
+    }
+}
diff --git a/_6_collections/src/main/java/code/out/production/code/code/_0_activity/Activity.class b/_6_collections/src/main/java/code/out/production/code/code/_0_activity/Activity.class
new file mode 100644
index 0000000000000000000000000000000000000000..6b4d880a79db5cc9aaf59070dbe87975f7699c58
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HcmV?d00001

diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/Main.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..717d10d7c6dc140aa311d3b5ac12f31d3169cbc0
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_10_deque_interface/DequeExample.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_10_deque_interface/DequeExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..2c35805e87a0afff3aa77251621a3f7fb0d991e9
GIT binary patch
literal 1005
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_11_set_interface/SetExample.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_11_set_interface/SetExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..1d132cbd22eca9959d3af151bc04ff90a2b75dd9
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_12_map_interface/MapExample.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_12_map_interface/MapExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..8cf6c097ff069a2764fb01d0eab8926b8e5b1603
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new file mode 100644
index 0000000000000000000000000000000000000000..df9389136a59e880e690ac5d5f63d5d659b23371
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_13_equals_hashcode/EqualsAndHashCodeExample$GoodStudent.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_13_equals_hashcode/EqualsAndHashCodeExample$GoodStudent.class
new file mode 100644
index 0000000000000000000000000000000000000000..5b5a57bc067530e43c9d3574391235d0c850b738
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_13_equals_hashcode/EqualsAndHashCodeExample.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_13_equals_hashcode/EqualsAndHashCodeExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..cbd8c77a2268efb50e0f6c81ef56167ca3c84b0b
GIT binary patch
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new file mode 100644
index 0000000000000000000000000000000000000000..d4b475e62fdc7838f99428cd2243bb436dd2a164
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_14_ordering/OrderingExample$Person.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_14_ordering/OrderingExample$Person.class
new file mode 100644
index 0000000000000000000000000000000000000000..f69ffc2091ceffe02f4902dd94a75118028b005b
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_14_ordering/OrderingExample.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_14_ordering/OrderingExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..e72d57448ca661226ec1e6f2244e233f1d25293f
GIT binary patch
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new file mode 100644
index 0000000000000000000000000000000000000000..04fa0679431332994de7cf261ec45370fcb466a2
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new file mode 100644
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new file mode 100644
index 0000000000000000000000000000000000000000..206ee3c45ae78540733128d7863fef555637c28d
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new file mode 100644
index 0000000000000000000000000000000000000000..8d0ba12d4fcd2700ec1b5779cc89961e81ef5cd2
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_3_fail_fast_iterator/FailFastIterator.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_3_fail_fast_iterator/FailFastIterator.class
new file mode 100644
index 0000000000000000000000000000000000000000..923ef6f6a2e776ab281c56b545889ca07e31dfa0
GIT binary patch
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new file mode 100644
index 0000000000000000000000000000000000000000..a484b1a4de79e0ef0a6de31b60590726c7490d2b
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new file mode 100644
index 0000000000000000000000000000000000000000..988d9178c7cd6b27668f2802eee71ec4267f2044
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new file mode 100644
index 0000000000000000000000000000000000000000..7c5c8852be4e27f0d2e3f14ace0b082b9ea49329
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new file mode 100644
index 0000000000000000000000000000000000000000..ff5074649a8307783d3ab7e24885b36aafb5fe07
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new file mode 100644
index 0000000000000000000000000000000000000000..b99e9b79d3bda0aae489aeaa8b52059f0887d366
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new file mode 100644
index 0000000000000000000000000000000000000000..4c21b708d28bb8527c2ae5da12900dba58582e94
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_1_study/_9_queue_interface/QueueExample$Student.class b/_6_collections/src/main/java/code/out/production/code/code/_1_study/_9_queue_interface/QueueExample$Student.class
new file mode 100644
index 0000000000000000000000000000000000000000..d2f8c84ff12b2d3eac13e8645f2d05485d0a49c6
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new file mode 100644
index 0000000000000000000000000000000000000000..9598288e9a353a3cc8b722c72e60e037a043d1c0
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_1_leaders/LeadersChallenge.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_1_leaders/LeadersChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..c5d7f45fc3e8e6c0aab20b14569c4372409984ed
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_2_pascal_triangle/PascalTriangleChallenge.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_2_pascal_triangle/PascalTriangleChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..5136472602786ddbee8588c5731f2aabc50ea9b4
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index 0000000000000000000000000000000000000000..b586ae48249e4db4ecaeab36e0b7650576041cf9
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new file mode 100644
index 0000000000000000000000000000000000000000..8691839af85cdd2d81aa97b89a886890041959e4
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_5_merge_sorted_lists/MergeSortedListsChallenge.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_5_merge_sorted_lists/MergeSortedListsChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..5b5d821a7edc1965511e865708ee243ab03c3065
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_6_matrix_spiral/MatrixSpiralChallenge.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_6_matrix_spiral/MatrixSpiralChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..5abb92bbade236f63c8eec67713063a048dce7cb
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTable.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTable.class
new file mode 100644
index 0000000000000000000000000000000000000000..4bdc7bb440bf4eac9d0178e67aed6eb7f78c3e10
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTableChallenge.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTableChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..a1a5847fd34ebb9898238acf800017f31a43da5d
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTableImpl.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_7_my_hashtable/MyHashTableImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..7c7d73ccfc2a8bb1d742ad6bc376d7063bb72467
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayList.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayList.class
new file mode 100644
index 0000000000000000000000000000000000000000..90d42e8e296212652ebb33686c8430b7807b575d
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayListChallenge.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayListChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..445814986647c484b7137fde69e361532356bb1f
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayListImpl.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_8_my_arraylist/MyArrayListImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..9bd75f6a71849f7fe8c954bd8545bacbbe7c0d5b
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySet.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySet.class
new file mode 100644
index 0000000000000000000000000000000000000000..2f43d3b842b67f84eea85883f8a1ff6f99927693
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySetChallenge.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySetChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..79919c32fd29862bdd4d6fa5a4571e8bd08aa6d0
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySetImpl.class b/_6_collections/src/main/java/code/out/production/code/code/_2_challenge/_9_my_set/MySetImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..57ce7110f1b000a661a3df2c535b082cda074b4d
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_3_in_class/Main.class b/_6_collections/src/main/java/code/out/production/code/code/_3_in_class/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..e3969b684995b781ae0a4797a6d6bad610dc5d19
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/Main.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..7990d91a186bac917a5af3640b9dc74948dbe756
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_1_lleaders/LeadersChalllenge.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_1_lleaders/LeadersChalllenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..1125590ae139b065e57c5995a3f117a7405b66c0
GIT binary patch
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new file mode 100644
index 0000000000000000000000000000000000000000..34f7c70bbf4b03499097afbf557c123d5ff922f5
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index 0000000000000000000000000000000000000000..5d8e3b3f2c6f4583559a83e98e23eea55d3d7361
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_5_merge_sorted_list/MergeSortedLists.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_5_merge_sorted_list/MergeSortedLists.class
new file mode 100644
index 0000000000000000000000000000000000000000..07214244e70cd25b871d389ed5435d089534a84f
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_6_package_spiral/MatrixSpiral.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_6_package_spiral/MatrixSpiral.class
new file mode 100644
index 0000000000000000000000000000000000000000..8bc25aeb101373a90871ed636a6bd2fedf159b65
GIT binary patch
literal 2326
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literal 0
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/Challenge.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/Challenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..5ae41c1edbbb543bb122a3f9547ab556f91a73ac
GIT binary patch
literal 2155
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/MyHashhTable.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/MyHashhTable.class
new file mode 100644
index 0000000000000000000000000000000000000000..030fa57255c5a46ac89dc2bda9a2b761dc3bc621
GIT binary patch
literal 520
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literal 0
HcmV?d00001

diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/MyHashhTableImpl.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_7_my_hashhtable/MyHashhTableImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..dae6f4489e073d5735f1cbeefc80ade0821c3b87
GIT binary patch
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HcmV?d00001

diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/Challenge.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/Challenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..59a1364ef1aff489cc08560fcca22c12d8543944
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/MyArrayList.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/MyArrayList.class
new file mode 100644
index 0000000000000000000000000000000000000000..f64b364d5851837db491d570704bb4cc438d7579
GIT binary patch
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diff --git a/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/MyArrayListImpl.class b/_6_collections/src/main/java/code/out/production/code/code/_4_student_effort/_8_My_ArrayList/MyArrayListImpl.class
new file mode 100644
index 0000000000000000000000000000000000000000..2b83dee9b2a728d24fa35962e505b12cbe9de0f3
GIT binary patch
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HcmV?d00001

diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/Challenge.java b/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/Challenge.java
new file mode 100644
index 000000000..071969164
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/Challenge.java
@@ -0,0 +1,34 @@
+package code._4_student_effort._1_rabbbit_race;
+
+public class Challenge {
+    public static void main(String[] args)
+    {
+        run();
+    }
+
+    public static Thread createRunnable(int i) {
+        return new Thread(new RabbitRunnable(i));
+    }
+
+    public static Thread createThread(int i) {
+        return new Thread(new RabbitThread(i));
+    }
+
+    public static void startThread(Thread x) {
+        x.start();
+    }
+
+    public static Thread selectWhich(int i) {
+        if (i % 2 == 0)
+            return createRunnable(i);
+        else
+            return createThread(i);
+    }
+
+    public static void run() {
+        for (int i = 0; i < 10; i++) {
+            Thread a = selectWhich(i);
+            startThread(a);
+        }
+    }
+}
diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitRunnable.java b/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitRunnable.java
new file mode 100644
index 000000000..fa198ad23
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitRunnable.java
@@ -0,0 +1,15 @@
+package code._4_student_effort._1_rabbbit_race;
+
+public class RabbitRunnable implements Runnable
+{
+    private int nr;
+
+    public RabbitRunnable(int i)
+    {
+        nr=i;
+    }
+    public void run()
+    {
+        System.out.println("Rabbit no "+ nr + "is running");
+    }
+}
diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitThread.java b/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitThread.java
new file mode 100644
index 000000000..17a62ecc2
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_1_rabbbit_race/RabbitThread.java
@@ -0,0 +1,17 @@
+package code._4_student_effort._1_rabbbit_race;
+
+import java.util.concurrent.RunnableFuture;
+
+public class RabbitThread extends Thread
+{
+    private int nr;
+
+    public RabbitThread(int nr)
+    {
+        this.nr=nr;
+    }
+    public void run()
+    {
+        System.out.println("Rabbit no. "+nr+" is running");
+    }
+}
diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/BankAccount.java b/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/BankAccount.java
new file mode 100644
index 000000000..5c8aa60a8
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/BankAccount.java
@@ -0,0 +1,33 @@
+package code._4_student_effort._2_Bank_transactions;
+
+public class BankAccount
+{
+    private String name;
+    private int debit;
+    public BankAccount(String name,int debit)
+    {
+        this.name=name;
+        this.debit=debit;
+    }
+    public void withdraw(int amount)
+    {
+        simulateLongDatabaseCall();
+        if(debit>=amount)
+            debit=debit-amount;
+        else
+            System.out.println("There are not enough money in this bank");
+    }
+    public void deposit(int amount)
+    {
+        simulateLongDatabaseCall();
+        debit=debit+amount;
+    }
+    public void simulateLongDatabaseCall()
+    {
+        try{
+            Thread.sleep(100);
+        } catch (InterruptedException e){
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/Challenge.java b/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/Challenge.java
new file mode 100644
index 000000000..177895388
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/Challenge.java
@@ -0,0 +1,41 @@
+package code._4_student_effort._2_Bank_transactions;
+
+import code._2_challenge._2_bank_transactions.BankAccount;
+import code._2_challenge._2_bank_transactions.TransactionThread;
+
+public class Challenge
+{
+    public static void main(String[] args) throws Exception
+    {
+       /* BankAccount bank1=new BankAccount("Banca1",100);
+        BankAccount bank2=new BankAccount("Banca2",200);
+        TransactionThread transactionThread1=new TransactionThread("Tranzactie1",bank1,bank2,10);
+        TransactionThread transactionThread2=new TransactionThread("tranzactie2",bank2,bank1,30);
+        transactionThread1.start();
+        transactionThread2.start();
+       // transactionThread1.join();
+       // transactionThread2.join();*/
+        code._2_challenge._2_bank_transactions.BankAccount momAccount = new code._2_challenge._2_bank_transactions.BankAccount("mom", 100_000);
+        code._2_challenge._2_bank_transactions.BankAccount myAccount = new BankAccount("me", 100);
+        System.out.println("before:");
+        System.out.println(momAccount);
+        System.out.println(myAccount);
+
+        code._2_challenge._2_bank_transactions.TransactionThread t1 = new code._2_challenge._2_bank_transactions.TransactionThread("T1", momAccount, myAccount, 10);
+        code._2_challenge._2_bank_transactions.TransactionThread t2 = new TransactionThread("T2", momAccount, myAccount, 100);
+
+        //start transacting
+        t1.start();
+        t2.start();
+
+        //wait for transfers to be completed
+        t1.join();
+        t2.join();
+
+        System.out.println("after:");
+        System.out.println(momAccount);
+        System.out.println(myAccount);
+    }
+
+}
+
diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/TransactionThread.java b/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/TransactionThread.java
new file mode 100644
index 000000000..ccb27d4c9
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_2_Bank_transactions/TransactionThread.java
@@ -0,0 +1,35 @@
+package code._4_student_effort._2_Bank_transactions;
+
+public class TransactionThread extends Thread
+{
+    private String name;
+    private BankAccount from;
+    private BankAccount to;
+    private int amount;
+    public TransactionThread(String name,BankAccount from, BankAccount to, int amount)
+    {
+        super(name);
+        this.from=from;
+        this.to=to;
+        this.amount=amount;
+    }
+    public void run()
+    {
+        transfer(from,to,amount);
+    }
+    public boolean transfer(BankAccount from, BankAccount to, int amount)
+    {
+        boolean success = false;
+        synchronized(from) //locking on intrinsic lock of 'from' Object
+        {
+            from.withdraw(amount);
+            synchronized (to) //locking on intrinsic lock of 'to' Object
+            {
+                to.deposit(amount);
+                success=true;
+            }
+        }
+        return success;
+    }
+
+}
diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Challenge.java b/_7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Challenge.java
new file mode 100644
index 000000000..f05d05203
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Challenge.java
@@ -0,0 +1,17 @@
+package code._4_student_effort._3_rock_paper_scissors;
+
+public class Challenge
+{
+    public static void main(String[] args) throws Throwable
+    {
+        Player p1=new Player("Fabi","");
+        Player p2=new Player("Andra", "");
+        p1.start();
+        p2.start();
+
+        p1.join();
+        p2.join();
+
+        System.out.println("Extragereile au fost "+ p1.getExtragere() + " si "+ p2.getExtragere());
+    }
+}
diff --git a/_7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Player.java b/_7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Player.java
new file mode 100644
index 000000000..a4c28d9de
--- /dev/null
+++ b/_7_concurrency/src/main/java/code/_4_student_effort/_3_rock_paper_scissors/Player.java
@@ -0,0 +1,30 @@
+package code._4_student_effort._3_rock_paper_scissors;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+
+public class Player extends Thread
+{
+    private String nume;
+    private String extragere;
+
+    public Player(String nume,String extragere)
+    {
+        this.nume=nume;
+        this.extragere=extragere;
+    }
+    public void run()
+    {
+        this.randomExtraction();
+    }
+    public void randomExtraction()
+    {
+        List<String> options= Arrays.asList("Piatra","Hartie","Foarfeca");
+        extragere=options.get(new Random().nextInt(3));
+    }
+    public String getExtragere()
+    {
+        return extragere;
+    }
+}
diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/Main.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..717d10d7c6dc140aa311d3b5ac12f31d3169cbc0
GIT binary patch
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literal 0
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_1_contention/ContentionExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_1_contention/ContentionExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..83cb1ff9c27b550952e993ef16132490471372c7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_1_contention/MyThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_1_contention/MyThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..f7693613382c6cef35f5df6fd179edd0d1ba4af8
GIT binary patch
literal 525
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/Consumer.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/Consumer.class
new file mode 100644
index 0000000000000000000000000000000000000000..711238e50726661ca9b0cfbc9af98e9fc00f32a7
GIT binary patch
literal 1219
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/IChannel.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/IChannel.class
new file mode 100644
index 0000000000000000000000000000000000000000..079c1aa1ef858a26a682b3c8e9fb283ff40c2fce
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/LackOfCoordinationChannel.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/LackOfCoordinationChannel.class
new file mode 100644
index 0000000000000000000000000000000000000000..7ad34b9e24f9bdf607686b447349f2cf3785962b
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/LackOfCoordinationExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/LackOfCoordinationExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..0b112797467c305ef17e6d22d60680bacdc39723
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/Producer.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_2_lack_of_coordination/Producer.class
new file mode 100644
index 0000000000000000000000000000000000000000..f40263b14aa621425d317df5ab59cf6cd85b3e67
GIT binary patch
literal 815
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/Consumer.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/Consumer.class
new file mode 100644
index 0000000000000000000000000000000000000000..05f7d4653730cb49adc5b03247ad6d5d404e70f7
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/GoodCoordinationChannel.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/GoodCoordinationChannel.class
new file mode 100644
index 0000000000000000000000000000000000000000..b9dd6632469dea9808a8db7b850c52243c767c18
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/GoodCoordinationExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/GoodCoordinationExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..27b27ff8d2151b531ba1c55f76db9690dd7d08c0
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/IChannel.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/IChannel.class
new file mode 100644
index 0000000000000000000000000000000000000000..ce79621281e40a9e79bd140ea3f4ddcdfc52504d
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/Producer.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_3_good_coordination/Producer.class
new file mode 100644
index 0000000000000000000000000000000000000000..b2b13e9779c06f6acbdbc92bb8c3977b6a16b526
GIT binary patch
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literal 0
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/OnePersonKitchen.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/OnePersonKitchen.class
new file mode 100644
index 0000000000000000000000000000000000000000..c80fe1d8b76a84e0c4e770869a6dcb1984bd098e
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/Person.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/Person.class
new file mode 100644
index 0000000000000000000000000000000000000000..bce044fe4d7af2d3fa9d922f28e50634784125d1
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/PersonThatNeverFinishesEating.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/PersonThatNeverFinishesEating.class
new file mode 100644
index 0000000000000000000000000000000000000000..0d6eaee41ff9df630a98b07c9c965e2d7cfea9c9
GIT binary patch
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literal 0
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/StarvationExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_4_starvation/StarvationExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..31bcc7038e7a80dfc7f836f12739a8e49fd6c29c
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/BankAccount.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/BankAccount.class
new file mode 100644
index 0000000000000000000000000000000000000000..44780e2f41b2aa41f12a656f9f7fdd6255841747
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/IntrinsicLocksExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/IntrinsicLocksExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..fe42dad8824b7c3da28ebb99f581ec8d256530a0
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/TransactionThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_5_intrinsic_locks/TransactionThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..0154f3012de357570075b082c4364a08b3cb2de5
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/BankAccount.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/BankAccount.class
new file mode 100644
index 0000000000000000000000000000000000000000..df270537dd5fdab81a23a159c0e53f01c56de319
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/LockObjectsExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/LockObjectsExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..40228f3577efe0fecd4baf3313633dc63524ea54
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/TransactionThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_6_lock_objects/TransactionThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..22fe0e65a990d6e76db6b9195557ba4d2fef1220
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/BankAccount.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/BankAccount.class
new file mode 100644
index 0000000000000000000000000000000000000000..fe64f5850ded75f1ad96c27c716e89de2264bbce
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/DeadlockExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/DeadlockExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..a90a9b086f1f28dadcc94bc3b35101359476e63a
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/TransactionThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_7_deadlock/TransactionThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..8b68ac2c1b3a892ef69a25258c51a630f814dfba
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/BankAccount.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/BankAccount.class
new file mode 100644
index 0000000000000000000000000000000000000000..4144f70fdc367b892dd0c08c8ec5422a7fd49787
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/LivelockExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/LivelockExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..fbd97cf7fded78571ca977e4ed971295fbdd49f9
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/TransactionThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_8_livelock/TransactionThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..462369c3c54ca104311926c34b999e59502d235d
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_9_executors/ExecutorsExample.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_9_executors/ExecutorsExample.class
new file mode 100644
index 0000000000000000000000000000000000000000..08b3d17cb44987fa9bd6a4375b46eb0e223300ec
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_9_executors/Task.class b/_7_concurrency/src/main/java/code/out/production/code/code/_1_study/_9_executors/Task.class
new file mode 100644
index 0000000000000000000000000000000000000000..da9645b960131929a64a2d5f6410956a224cacdd
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/Main.class b/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..9598288e9a353a3cc8b722c72e60e037a043d1c0
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitRaceChallenge.class b/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitRaceChallenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..a17904272d181f951de333f4b59643981c10cee3
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitRunnable.class b/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitRunnable.class
new file mode 100644
index 0000000000000000000000000000000000000000..22816f740fa029aedee92a4c267bd01489c9517e
GIT binary patch
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literal 0
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_1_rabbit_race/RabbitThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..ac6e584f4fbfb5bcb1361cf0b37807fbab4a1d56
GIT binary patch
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new file mode 100644
index 0000000000000000000000000000000000000000..f17f37a72d6aaa2eb1dc70f56ebea623c959eaa7
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_2_bank_transactions/TransactionThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_2_challenge/_2_bank_transactions/TransactionThread.class
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new file mode 100644
index 0000000000000000000000000000000000000000..6cf164a01974675eb365f2b8916999d3fc30b97d
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_3_in_class/Main.class b/_7_concurrency/src/main/java/code/out/production/code/code/_3_in_class/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..3c17820f15320fdc8d436ac08bd6e8b3573976ca
GIT binary patch
literal 448
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/Main.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..7990d91a186bac917a5af3640b9dc74948dbe756
GIT binary patch
literal 401
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/Challenge.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/Challenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..737e2fb1218fcdd6336392000d7150110b9d2164
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/RabbitRunnable.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/RabbitRunnable.class
new file mode 100644
index 0000000000000000000000000000000000000000..5de3f6578392f497fc322bdac77df9b40a4f0e7e
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/RabbitThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_1_rabbbit_race/RabbitThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..b4788f5782b80624755cf423104b8148d42925e0
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/BankAccount.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/BankAccount.class
new file mode 100644
index 0000000000000000000000000000000000000000..269a38d3e33dcb1dfada968b0a8b078e85ae02ad
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/Challenge.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/Challenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..015a89d60689da6a0d32c465abbf13bea46a8912
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/TransactionThread.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_2_Bank_transactions/TransactionThread.class
new file mode 100644
index 0000000000000000000000000000000000000000..fb54806ab4efbc0908f60579886d04ea14919d96
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_3_rock_paper_scissors/Challenge.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_3_rock_paper_scissors/Challenge.class
new file mode 100644
index 0000000000000000000000000000000000000000..a0d48f7e6ebb339a4da4e33794d0d6af6edcdec8
GIT binary patch
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diff --git a/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_3_rock_paper_scissors/Player.class b/_7_concurrency/src/main/java/code/out/production/code/code/_4_student_effort/_3_rock_paper_scissors/Player.class
new file mode 100644
index 0000000000000000000000000000000000000000..7c0787df1f358437a8f02f11e85f838e197ab1cb
GIT binary patch
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HcmV?d00001

diff --git a/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/ChessBoard.java b/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/ChessBoard.java
index 1e40d959f..bf9d3809e 100644
--- a/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/ChessBoard.java
+++ b/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/ChessBoard.java
@@ -7,16 +7,61 @@ public class ChessBoard {
 
     private Pawn[][] pieces;
 
-    public ChessBoard() {
+    public ChessBoard()
+    {
         pieces = new Pawn[MAX_BOARD_WIDTH][MAX_BOARD_HEIGHT];
-
     }
 
-    public void Add(Pawn pawn, int xCoordinate, int yCoordinate, PieceColor pieceColor) {
-        throw new UnsupportedOperationException("Need to implement ChessBoard.add()");
+    public void Add(Pawn pawn, int xCoordinate, int yCoordinate, PieceColor pieceColor)
+    {
+        int ok=0;
+        if(IsLegalBoardPosition(xCoordinate,yCoordinate))
+        {
+            if(pieceColor.equals(PieceColor.BLACK))
+            {
+                if(xCoordinate==6)
+                {
+                    if(pieces[xCoordinate][yCoordinate]==null)
+                    {
+                        pawn.setXCoordinate(xCoordinate);
+                        pawn.setYCoordinate(yCoordinate);
+                        pawn.setChessBoard(this);
+                        pieces[xCoordinate][yCoordinate]=pawn;
+                        ok=1;
+                    }
+                }
+            }
+            if(pieceColor.equals(PieceColor.WHITE))
+            {
+                if(xCoordinate==1)
+                {
+                    if(pieces[xCoordinate][yCoordinate]==null)
+                    {
+                        pawn.setXCoordinate(xCoordinate);
+                        pawn.setYCoordinate(yCoordinate);
+                        pawn.setChessBoard(this);
+                        pieces[xCoordinate][yCoordinate]=pawn;
+                        ok=1;
+                    }
+                }
+            }
+        }
+        if(ok==0)
+        {
+            pawn.setXCoordinate(-1);
+            pawn.setYCoordinate(-1);
+        }
     }
 
-    public boolean IsLegalBoardPosition(int xCoordinate, int yCoordinate) {
-        throw new UnsupportedOperationException("Need to implement ChessBoard.IsLegalBoardPosition()");
+    public boolean IsLegalBoardPosition(int xCoordinate, int yCoordinate)
+    {
+        if (xCoordinate <= 7 && xCoordinate >= 0 && yCoordinate >= 0 && yCoordinate <=7)
+            return true;
+        else
+            return false;
+    }
+    public  Pawn getPiece(int x,int y)
+    {
+        return pieces[x][y];
     }
 }
diff --git a/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/Pawn.java b/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/Pawn.java
index e589abeb7..bcb5ddb1b 100644
--- a/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/Pawn.java
+++ b/clean_code_projects/_1_project_requirements_chess/src/main/java/clean/code/chess/requirements/Pawn.java
@@ -43,8 +43,25 @@ private void setPieceColor(PieceColor value) {
         pieceColor = value;
     }
 
-    public void Move(MovementType movementType, int newX, int newY) {
-        throw new UnsupportedOperationException("Need to implement Pawn.Move()");
+    public void Move(MovementType movementType, int newX, int newY)
+    {
+        if(movementType.equals(movementType.MOVE))
+        {
+            if(pieceColor.equals(PieceColor.WHITE))
+            {
+                if(this.getChesssBoard().getPiece(xCoordinate+1,yCoordinate)==null && newX==xCoordinate+1  && newY==yCoordinate)
+                {
+                    xCoordinate=xCoordinate+1;
+                }
+            }
+            if(pieceColor.equals(PieceColor.BLACK)&& newX==xCoordinate-1  && newY==yCoordinate)
+            {
+                if(this.getChesssBoard().getPiece(xCoordinate-1,yCoordinate)==null)
+                {
+                    xCoordinate=xCoordinate-1;
+                }
+            }
+        }
     }
 
     @Override
diff --git a/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/ChessBoardTest.java b/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/ChessBoardTest.java
index 5b8ca4079..681e666cd 100644
--- a/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/ChessBoardTest.java
+++ b/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/ChessBoardTest.java
@@ -39,7 +39,7 @@ public void testIsLegalBoardPosition_True_X_equals_5_Y_equals_5() {
     @Test
     public void testIsLegalBoardPosition_False_X_equals_11_Y_equals_5() {
         boolean isValidPosition = testSubject.IsLegalBoardPosition(11, 5);
-        assertTrue(isValidPosition);
+        assertFalse(isValidPosition);
     }
 
     @Test
diff --git a/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/PawnTest.java b/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/PawnTest.java
index beee03f37..6c24da37a 100644
--- a/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/PawnTest.java
+++ b/clean_code_projects/_1_project_requirements_chess/src/test/java/clean/code/chess/requirements/PawnTest.java
@@ -48,9 +48,9 @@ public void testPawn_Move_IllegalCoordinates_Left_DoesNotMove() {
     @Test
     public void testPawn_Move_LegalCoordinates_Forward_UpdatesCoordinates() {
         chessBoard.Add(testSubject, 6, 3, PieceColor.BLACK);
-        testSubject.Move(MovementType.MOVE, 6, 2);
-        assertEquals(6, testSubject.getXCoordinate());
-        assertEquals(2, testSubject.getYCoordinate());
+        testSubject.Move(MovementType.MOVE, 5, 3);
+        assertEquals(5, testSubject.getXCoordinate());
+        assertEquals(3, testSubject.getYCoordinate());
     }
 
 }
\ No newline at end of file