Lesson_8

proJect/src/main/java/anlov/java/Main.java

@@ -1,9 +1,42 @@
 package anlov.java;
 
 
-import java.util.Arrays;
+import java.util.*;
 
 public class Main {
     public static void main(String[] args) {
+
+        // Задание 1
+        String[] words = {"1", "2", "3", "1", "2", "3", "1", "2", "3", "1", "2", "3", "1", "2", "3", "1", "2", "3"};
+        Set<String> uniqueWords = new HashSet<>(Arrays.asList(words));
+        System.out.println(uniqueWords);
+
+        Map<String, Integer> map = new HashMap<>();
+        for (String s : words) {
+            if (map.containsKey(s)) {
+                map.put(s, map.get(s) + 1);
+            } else {
+                map.put(s, 1);
+
+            }
+        }
+        for (Map.Entry<String, Integer> map1 : map.entrySet()) {
+            System.out.printf("Слово: %s встречается %d раз\n", map1.getKey(), map1.getValue());
+        }
+
+        // Задание 2
+        PhoneBook phoneBook = new PhoneBook();
+
+        try {
+            phoneBook.addNew("", "555555"); // IllegalArgumentException!
+        } catch (IllegalArgumentException e) {
+            System.out.println("Ошибка: " + e.getMessage());
+        }
+
+        phoneBook.addNew("Орлов", "7917111134");
+        phoneBook.addNew("Орлов", "1234566789");
+        phoneBook.addNew("Петров", "7917111134");
+
+        phoneBook.getNumbers("Орлов");
     }
 }

proJect/src/main/java/anlov/java/PhoneBook.java

@@ -0,0 +1,35 @@
+package anlov.java;
+
+import java.util.*;
+
+public class PhoneBook {
+    Map<String, List<String>> phoneBook;
+
+    public PhoneBook() {
+        this.phoneBook = new HashMap<>();
+    }
+
+    public void addNew(String lastName, String mobilePhone) {
+        if (lastName == null || mobilePhone == null || lastName.trim().isEmpty() || mobilePhone.trim().isEmpty()) {
+            throw new IllegalArgumentException("Заполните обязательные поля");
+        } else if (phoneBook.containsKey(lastName)) {
+            List<String> number = phoneBook.get(lastName);
+
+            if (number.contains(mobilePhone)) {
+                System.out.printf("Номер %s уже есть у абонента %s.%n", mobilePhone, lastName);
+            } else {
+                number.add(mobilePhone);
+                System.out.printf("Номер %s добавлен для %s.%n", mobilePhone, lastName);
+            }
+        } else {
+            phoneBook.put(lastName, new ArrayList<>(Arrays.asList(mobilePhone)));
+            System.out.println("Добавлен новый абонент.");
+        }
+
+    }
+
+    public void getNumbers(String lastName) {
+        phoneBook.get(lastName);
+        System.out.printf("По фамили %s, я нашел следующие номера: %s", lastName, phoneBook.get(lastName));
+    }
+}