diff --git a/README.md b/README.md
index 6d4679c54..7be4eec48 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # java-training
-
+###
 # 1 basics
 
 	- code study
@@ -162,4 +162,4 @@
 # clean code projects
 
     - design patterns
-    - chess game		
\ No newline at end of file
+    - chess game		
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/Booking.java b/_3_design_patterns/src/main/java/code/_4_student_effort/Booking.java
new file mode 100644
index 000000000..363cfbb42
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/Booking.java
@@ -0,0 +1,180 @@
+package code._4_student_effort;
+import java.time.LocalDate;
+
+public class Booking {
+    Person person;
+    Hotel hotel;
+    LocalDate arriveDate;
+    LocalDate leaveDate;
+    int price;
+
+    boolean takeBreakfast;
+    boolean takeMeals;
+    boolean openBar;
+    boolean spaAccess;
+    boolean parking;
+    boolean airportTransfer;
+
+    public Person getPerson() {
+        return person;
+    }
+
+    public Hotel getHotel() {
+        return hotel;
+    }
+
+    public LocalDate getArriveDate() {
+        return arriveDate;
+    }
+
+    public LocalDate getLeaveDate() {
+        return leaveDate;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public boolean getBreakfast() {
+        return takeBreakfast;
+    }
+
+    public boolean getMeals() {
+        return takeMeals;
+    }
+
+    public boolean getOpenBar() {
+        return openBar;
+    }
+
+    public boolean getSpaAccess() {
+        return spaAccess;
+    }
+
+    public boolean getParking() {
+        return parking;
+    }
+
+    public boolean getAirportTransfer() {
+        return airportTransfer;
+    }
+
+
+    Booking(BookingBuilder builder) {
+        person = builder.person;
+        hotel = builder.hotel;
+        arriveDate = builder.arriveDate;
+        leaveDate = builder.leaveDate;
+        price = builder.price;
+
+        takeBreakfast = builder.takeBreakfast;
+        takeMeals = builder.takeMeals;
+        openBar = builder.openBar;
+        spaAccess = builder.spaAccess;
+        parking = builder.parking;
+        airportTransfer = builder.airportTransfer;
+    }
+
+    public static class BookingBuilder {
+        Person person;
+        Hotel hotel;
+        LocalDate arriveDate;
+        LocalDate leaveDate;
+        int price;
+
+        boolean takeBreakfast;
+        boolean takeMeals;
+        boolean openBar;
+        boolean spaAccess;
+        boolean parking;
+        boolean airportTransfer;
+
+        BookingBuilder(Person guest, Hotel host, LocalDate aDate, LocalDate lDate) {
+            person = guest;
+            hotel = host;
+            arriveDate = aDate;
+            leaveDate = lDate;
+        }
+
+        public BookingBuilder setBreakfastService(boolean takeBreakfastService) {
+            if (hotel.takeBreakfast)
+                takeBreakfast = takeBreakfastService;
+            else
+                System.out.printf("Breakfast Service is not avalable for " + hotel.getName() + "\n");
+            return this;
+        }
+
+        public BookingBuilder setMealsService(boolean takeMealsService) {
+            if (hotel.takeMeals)
+                takeMeals = takeMealsService;
+            else
+                System.out.printf("Meals Service is not avalable for " + hotel.getName() + "\n");
+            return this;
+        }
+
+        public BookingBuilder setOpenBarService(boolean takeOpenBarService) {
+            if (hotel.openBar)
+                openBar = takeOpenBarService;
+            else
+                System.out.printf("Breakfast Service is not avalable for " + hotel.getName() + "\n");
+            return this;
+        }
+
+        public BookingBuilder setSpaAccessService(boolean takeSpaAccessService) {
+            if (hotel.spaAccess)
+                spaAccess = takeSpaAccessService;
+            else
+                System.out.printf("Breakfast Service is not avalable for " + hotel.getName() + "\n");
+            return this;
+        }
+
+        public BookingBuilder setParkingService(boolean takeParkingService) {
+            if (hotel.parking)
+                parking = takeParkingService;
+            else
+                System.out.printf("Breakfast Service is not avalable for " + hotel.getName() + "\n");
+            return this;
+        }
+
+        public BookingBuilder setAirportTransferService(boolean takeAirportTransferService) {
+            if (hotel.airportTransfer)
+                airportTransfer = takeAirportTransferService;
+            else
+                System.out.printf("Breakfast Service is not avalable for " + hotel.getName() + "\n");
+            return this;
+        }
+
+        public BookingBuilder setPrice() {
+            price = 100;
+            return this;
+        }
+
+        public Booking build() {
+            return new Booking(this);
+        }
+    }
+
+    public StringBuilder getServices() {
+        StringBuilder services = new StringBuilder();
+
+        if (takeBreakfast)
+            services.append("- Breakfast\n");
+        if (takeMeals)
+            services.append("- Meals\n");
+        if (openBar)
+            services.append("- Open Bar\n");
+        if (spaAccess)
+            services.append("- Spa\n");
+        if (parking)
+            services.append("- Parking\n");
+        if (airportTransfer)
+            services.append("- Airport Transfer\n");
+        return services;
+    }
+
+    public String getApprovedServices() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/EnumRatings.java b/_3_design_patterns/src/main/java/code/_4_student_effort/EnumRatings.java
new file mode 100644
index 000000000..89dcaa6a9
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/EnumRatings.java
@@ -0,0 +1,12 @@
+package code._4_student_effort;
+public class EnumRatings {
+    Rating rate;
+
+    EnumRatings() {
+
+    }
+
+    EnumRatings(Rating rate) {
+        this.rate = rate;
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/EnumStars.java b/_3_design_patterns/src/main/java/code/_4_student_effort/EnumStars.java
new file mode 100644
index 000000000..0f8061be2
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/EnumStars.java
@@ -0,0 +1,28 @@
+package code._4_student_effort;
+public class EnumStars {
+    Stars star;
+
+    EnumStars() {
+
+    }
+
+    EnumStars(Stars star) {
+        this.star = star;
+    }
+
+    public String getStars() {
+        switch (star) {
+            case one:
+                return "*";
+            case two:
+                return "**";
+            case three:
+                return "***";
+            case four:
+                return "****";
+            case five:
+                return "*****";
+        }
+        return null;
+    }
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/Hotel.java b/_3_design_patterns/src/main/java/code/_4_student_effort/Hotel.java
new file mode 100644
index 000000000..130bbcda7
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/Hotel.java
@@ -0,0 +1,162 @@
+package code._4_student_effort;
+
+public class Hotel {
+    String name;
+    String city;
+    String adress;
+    EnumStars stars;
+    EnumRatings rating;
+    int pricePerNight;
+
+    boolean takeBreakfast;
+    boolean takeMeals;
+    boolean openBar;
+    boolean spaAccess;
+    boolean parking;
+    boolean airportTransfer;
+
+    Hotel(HotelBuilder builder) {
+        name = builder.name;
+        city = builder.city;
+        adress = builder.adress;
+        stars = builder.stars;
+        rating = builder.rating;
+        pricePerNight = builder.pricePerNight;
+
+        takeBreakfast = builder.takeBreakfast;
+        takeMeals = builder.takeMeals;
+        openBar = builder.openBar;
+        spaAccess = builder.spaAccess;
+        parking = builder.parking;
+        airportTransfer = builder.airportTransfer;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public String getAdress() {
+        return adress;
+    }
+
+    public EnumStars getStars() {
+        return stars;
+    }
+
+    public EnumRatings getRating() {
+        return rating;
+    }
+
+    public int getPrice() {
+        return pricePerNight;
+    }
+
+    public boolean getBreakfast() {
+        return takeBreakfast;
+    }
+
+    public boolean getMeals() {
+        return takeMeals;
+    }
+
+    public boolean getOpenBar() {
+        return openBar;
+    }
+
+    public boolean getSpaAccess() {
+        return spaAccess;
+    }
+
+    public boolean getParking() {
+        return parking;
+    }
+
+    public boolean getAirportTransfer() {
+        return airportTransfer;
+    }
+
+    public static class HotelBuilder {
+
+        String name;
+        String city;
+        String adress;
+        EnumStars stars;
+        EnumRatings rating;
+        int pricePerNight;
+
+        boolean takeBreakfast;
+        boolean takeMeals;
+        boolean openBar;
+        boolean spaAccess;
+        boolean parking;
+        boolean airportTransfer;
+
+        public HotelBuilder(String hotelName, String hotelCity, String hotelAdress, EnumStars hotelStars,
+                            EnumRatings hotelRating, int price) {
+            name = hotelName;
+            city = hotelCity;
+            adress = hotelAdress;
+            stars = hotelStars;
+            rating = hotelRating;
+            pricePerNight = price;
+        }
+
+        public HotelBuilder setBreakfastService(boolean takeBreakfastService) {
+            takeBreakfast = takeBreakfastService;
+            return this;
+        }
+
+        public HotelBuilder setMealsService(boolean takeMealsService) {
+            takeMeals = takeMealsService;
+            return this;
+        }
+
+        public HotelBuilder setOpenBarService(boolean takeOpenBarService) {
+            openBar = takeOpenBarService;
+            return this;
+        }
+
+        public HotelBuilder setSpaAccessService(boolean takeSpaAccessService) {
+            spaAccess = takeSpaAccessService;
+            return this;
+        }
+
+        public HotelBuilder setParkingService(boolean takeParkingService) {
+            parking = takeParkingService;
+            return this;
+        }
+
+        public HotelBuilder setAirportTransferService(boolean takeAirportTransferService) {
+            airportTransfer = takeAirportTransferService;
+            return this;
+        }
+
+        public Hotel build() {
+            return new Hotel(this);
+        }
+
+    }
+
+    public StringBuilder getAvalableServices() {
+        StringBuilder services = new StringBuilder();
+
+        if (takeBreakfast)
+            services.append("- Breakfast\n");
+        if (takeMeals)
+            services.append("- Meals\n");
+        if (openBar)
+            services.append("- Open Bar\n");
+        if (spaAccess)
+            services.append("- Spa\n");
+        if (parking)
+            services.append("- Parking\n");
+        if (airportTransfer)
+            services.append("- Airport Transfer\n");
+        return services;
+    }
+
+}
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..9d98ba6f1 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
@@ -3,6 +3,27 @@
 public class Main {
 
     public static void main(String[] args) {
-        //TODO put your code changes in here
+        Person guest = new Person("Oana", "Albina", "2981118105053");
+
+        EnumStars hotelStars = new EnumStars(Stars.three);
+        EnumRatings hotelRating = new EnumRatings(Rating.excellent);
+        Hotel host = new Hotel.HotelBuilder("Giulia", "Rome", "str. Turini", hotelStars, hotelRating, 200)
+                .setMealsService(true).setSpaAccessService(true).setParkingService(true)
+                .build();
+
+        System.out.printf(
+                "Hotel " + host.getName() + " has the following services available:\n" + host.getAvalableServices());
+
+
+        LocalDate aDate = LocalDate.parse("2021-11-17", DateTimeFormatter.ISO_LOCAL_DATE);
+        LocalDate lDate = LocalDate.parse("2021-11-21", DateTimeFormatter.ISO_LOCAL_DATE);
+        Booking booking = new Booking.BookingBuilder(guest, host, aDate, lDate).setBreakfastService(true)
+                .setSpaAccessService(true).setParkingService(true).build();
+
+        System.out.printf(booking.person.getName() + " " + booking.person.getLastName()
+                + " asked for a booking between " + booking.arriveDate + " and " + booking.leaveDate + " at hotel "
+                + booking.hotel.getName() + " " + booking.hotel.stars.getStars()
+                + " with the following services included:\n" + booking.getServices());
     }
 }
+
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/Person.java b/_3_design_patterns/src/main/java/code/_4_student_effort/Person.java
new file mode 100644
index 000000000..52b468859
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/Person.java
@@ -0,0 +1,29 @@
+package code._4_student_effort;
+public class Person {
+
+    String name;
+    String lastName;
+    String CNP;
+
+    Person() {
+    }
+
+    Person(String personName, String personLastName, String personCNP) {
+        name = personName;
+        lastName = personLastName;
+        CNP = personCNP;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public String CNP() {
+        return CNP;
+    }
+
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/Rating.java b/_3_design_patterns/src/main/java/code/_4_student_effort/Rating.java
new file mode 100644
index 000000000..4b33dc326
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/Rating.java
@@ -0,0 +1,4 @@
+package code._4_student_effort;
+public enum Rating {
+    bad, decent, good, excellent
+}
diff --git a/_3_design_patterns/src/main/java/code/_4_student_effort/Stars.java b/_3_design_patterns/src/main/java/code/_4_student_effort/Stars.java
new file mode 100644
index 000000000..d0482c0fb
--- /dev/null
+++ b/_3_design_patterns/src/main/java/code/_4_student_effort/Stars.java
@@ -0,0 +1,4 @@
+package code._4_student_effort;
+public enum Stars {
+    one, two, three, four, five
+}