diff --git a/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Apple.java b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Apple.java
new file mode 100644
index 0000000..173962d
--- /dev/null
+++ b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Apple.java
@@ -0,0 +1,7 @@
+package ru.gb.Dmitrieva.HomeWorkApp.Lesson_3;
+
+public class Apple extends Fruit{
+    public Apple() {
+        weight = 1.0;
+    }
+}
diff --git a/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Box.java b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Box.java
new file mode 100644
index 0000000..2243159
--- /dev/null
+++ b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Box.java
@@ -0,0 +1,30 @@
+package ru.gb.Dmitrieva.HomeWorkApp.Lesson_3;
+
+import java.util.ArrayList;
+
+public class Box<T extends Fruit> {
+    private ArrayList<T> fruitList = new ArrayList<>();
+
+    public void addFruit(T fruit){
+        this.fruitList.add(fruit);
+        if (fruitList.isEmpty());
+    }
+    
+    public double getWeight(){
+        int count = fruitList.size();
+        if (count==0) 
+            return 0;
+        return fruitList.get(0).getWeight()*count;
+    }
+
+    public boolean compare(Box box){
+        return this.getWeight()==box.getWeight();
+    }
+
+    public void pourOverTo(Box<T> destBox){
+        for (T fruit : fruitList){
+            destBox.addFruit(fruit);
+        }
+        fruitList.clear();
+    }
+}
diff --git a/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Fruit.java b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Fruit.java
new file mode 100644
index 0000000..6fd80af
--- /dev/null
+++ b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Fruit.java
@@ -0,0 +1,9 @@
+package ru.gb.Dmitrieva.HomeWorkApp.Lesson_3;
+
+public abstract class Fruit {
+    double weight;
+
+    public double getWeight(){
+        return weight;
+    };
+}
diff --git a/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Main.java b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Main.java
new file mode 100644
index 0000000..b9a636a
--- /dev/null
+++ b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Main.java
@@ -0,0 +1,59 @@
+package ru.gb.Dmitrieva.HomeWorkApp.Lesson_3;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+public class Main {
+    public static void main(String[] args) {
+        //Создаем массив
+        System.out.println("Магия уровня 1");
+        Integer[] arr = new Integer[]{1, 2, 3, 4, 5};
+        String[] arr2 = new String[]{"a", "b", "c", "d", "e"};
+        System.out.println(Arrays.toString(arr));
+        swap(arr, 0, 1);
+        System.out.println(Arrays.toString(arr));
+
+        System.out.println(Arrays.toString(arr2));
+        swap(arr2, 0, 4);
+        System.out.println(Arrays.toString(arr2));
+
+        //Операции с массивом
+        System.out.println("\nМагия уровня 2");
+        ArrayList<String> arrayList = toArrayList(arr2);
+        System.out.println(arrayList);
+
+        //Оперции с коробками
+        System.out.println("\nМагия уровня 3");
+        Box<Apple> appleBox1 = new Box<>();
+        Box<Apple> appleBox2 = new Box<>();
+        Box<Orange> orangeBox1 = new Box<>();
+        for (int i = 0; i < 10; i++) {
+            appleBox1.addFruit(new Apple());
+            orangeBox1.addFruit(new Orange());
+        }
+        for (int i = 0; i < 5; i++) {
+            appleBox2.addFruit(new Apple());
+        }
+        System.out.println("Масса первой коробки с яблоками: " + appleBox1.getWeight());
+        System.out.println("Масса второй коробки с яблоками: " + appleBox2.getWeight());
+        System.out.println("Масса коробки с апельсинами: " + orangeBox1.getWeight());
+        System.out.println("Результат сравнения 1й коробки с яблоками и коробки с апельсинами: "+appleBox1.compare(orangeBox1));
+
+        System.out.println("\nПересыпаем из второй коробки в первую...\n");
+        appleBox2.pourOverTo(appleBox1);
+        System.out.println("Масса первой коробки с яблоками: " + appleBox1.getWeight());
+        System.out.println("Масса второй коробки с яблоками: " + appleBox2.getWeight());
+        System.out.println("Масса коробки с апельсинами: " + orangeBox1.getWeight());
+        System.out.println("Результат сравнения 1й коробки с яблоками и коробки с апельсинами: "+appleBox1.compare(orangeBox1));
+    }
+
+    static void swap(Object[] arr, int num1, int num2) {
+        Object buf = arr[num1];
+        arr[num1] = arr[num2];
+        arr[num2] = buf;
+    }
+
+    static <T> ArrayList<T> toArrayList(T[] arr) {
+        return new ArrayList<T>(Arrays.asList(arr));
+    }
+}
diff --git a/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Orange.java b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Orange.java
new file mode 100644
index 0000000..ed86518
--- /dev/null
+++ b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_3/Orange.java
@@ -0,0 +1,8 @@
+package ru.gb.Dmitrieva.HomeWorkApp.Lesson_3;
+
+public class Orange extends Fruit
+{
+    public Orange() {
+        weight = 1.5;
+    }
+}
diff --git a/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_4/Main.java b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_4/Main.java
new file mode 100644
index 0000000..8383958
--- /dev/null
+++ b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_4/Main.java
@@ -0,0 +1,60 @@
+package ru.gb.Dmitrieva.HomeWorkApp.Lesson_4;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+
+public class Main {
+
+    public static void main(String[] args) {
+        //Задание 1
+        System.out.println("Считаем, сколько раз встречается каждое слово:");
+        countArray();
+
+        //Задание 2
+        System.out.println("Телефонная книга. Добавляем и ищем по фамилии:");
+        Phonebook phonebook = new Phonebook();
+
+        phonebook.putInfo("Popov", "+79999999991");
+        phonebook.putInfo("Svetlov", "+79999999992");
+        phonebook.putInfo("Kononenko", "+79999999993");
+        phonebook.putInfo("Popov", "+7911111111111");
+        phonebook.putInfo("Chernichev", "+791111222222");
+        phonebook.putInfo("Popov", "+7922222222");
+
+        phonebook.getInfo("Popov");
+        phonebook.getInfo("Chernichev");
+    }
+    private static void countArray() {
+        ArrayList<String> array = new ArrayList<>();
+        array.add("tea");
+        array.add("king");
+        array.add("map");
+        array.add("desert");
+        array.add("tea");
+        array.add("tea");
+        array.add("tea");
+        array.add("monkey");
+        array.add("eagle");
+        array.add("desert");
+        array.add("monkey");
+        array.add("map");
+        array.add("tea");
+        array.add("tea");
+        array.add("king");
+        array.add("map");
+        array.add("tea");
+        array.add("tea");
+        array.add("monkey");
+        array.add("monkey");
+
+        HashSet<String> arrayUnique = new HashSet<>(array);
+        ArrayList<String> arrayCount = new ArrayList<>(arrayUnique);
+
+        for (int i = 0; i < arrayUnique.size(); i++) {
+            System.out.println("Количество слов \"" + arrayCount.get(i) + "\": " + Collections.frequency(array, arrayCount.get(i)));
+        }
+        System.out.println("\n");
+    }
+
+}
\ No newline at end of file
diff --git a/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_4/Phonebook.java b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_4/Phonebook.java
new file mode 100644
index 0000000..b15445a
--- /dev/null
+++ b/src/ru/gb/Dmitrieva/HomeWorkApp/Lesson_4/Phonebook.java
@@ -0,0 +1,29 @@
+package ru.gb.Dmitrieva.HomeWorkApp.Lesson_4;
+
+import java.util.*;
+
+class Phonebook {
+    private final HashMap<String, String> phonebook = new HashMap<>();
+
+    private ArrayList<String> getPhone(String name) {
+        ArrayList<String> phones = new ArrayList<>();
+
+        Set<Map.Entry<String, String>> phonebookMap = this.phonebook.entrySet();
+        for (Map.Entry<String, String> entry : phonebookMap) {
+            if (Objects.equals(entry.getValue(), name))
+                phones.add(entry.getKey());
+        }
+        return phones;
+    }
+
+    void getInfo(String name) {
+        ArrayList<String> phones = getPhone(name);
+        for (String phone : phones) {
+            System.out.println("Номер " + name + ": " + phone);
+        }
+    }
+
+    void putInfo(String name, String phone) {
+        phonebook.put(phone, name);
+    }
+}
\ No newline at end of file