HomeWork 19

src/main/java/ru/otus/java/basic/homeworks/homework19/Application.java

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+package ru.otus.java.basic.homeworks.homework19;
+
+import ru.otus.java.basic.homeworks.homework19.fruit.Apple;
+import ru.otus.java.basic.homeworks.homework19.fruit.Fruit;
+import ru.otus.java.basic.homeworks.homework19.fruit.Orange;
+import ru.otus.java.basic.homeworks.homework19.fruit.Box;
+
+public class Application {
+    public static void main(String[] args) {
+        Apple apple1 = new Apple(8);
+        Apple apple2 = new Apple(14);
+        Apple apple3 = new Apple(5);
+
+        Orange orange1 = new Orange(10);
+        Orange orange2 = new Orange(12);
+        Orange orange3 = new Orange(7);
+
+        Box<Apple> appleBox = new Box<>();
+        Box<Orange> orangeBox = new Box<>();
+        Box<Fruit> box = new Box<>();
+
+        appleBox.add(apple1, apple2);
+        orangeBox.add(orange1, orange2);
+        box.add(apple3, orange3);
+
+        System.out.println("Результат сравнения коробок с яблоками и апельсинами: " + appleBox.compare(orangeBox));
+        System.out.println("Результат сравнения коробок с яблоками и фруктами: " + appleBox.compare(box));
+
+        System.out.println("    ");
+
+        System.out.println("Вес коробки с яблоками: " + appleBox.weight());
+        System.out.println("Вес коробки с фруктами: " + box.weight());
+
+        box.pour(appleBox);
+
+        System.out.println("Вес коробки с яблоками: " + appleBox.weight());
+        System.out.println("Вес коробки с фруктами: " + box.weight());
+
+        System.out.println("    ");
+
+        Box<Apple> emptyAppleBox = new Box<>();
+        Box<Fruit> emptyFruitBox = new Box<>();
+        emptyAppleBox.pour(emptyAppleBox);
+        emptyFruitBox.pour(emptyAppleBox);
+
+    }
+}

src/main/java/ru/otus/java/basic/homeworks/homework19/fruit/Apple.java

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+package ru.otus.java.basic.homeworks.homework19.fruit;
+
+public class Apple extends Fruit {
+    public Apple(int weight) {
+        super(weight);
+    }
+}

src/main/java/ru/otus/java/basic/homeworks/homework19/fruit/Box.java

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+package ru.otus.java.basic.homeworks.homework19.fruit;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class Box<T extends Fruit> {
+    private List<T> fruits;
+
+    public List<T> getFruits() {
+        return fruits;
+    }
+
+    public Box() {
+        fruits = new ArrayList<>();
+    }
+
+    public void add(T... fruit) {
+        fruits.addAll(Arrays.asList(fruit));
+    }
+
+    public double weight() {
+        double weight = 0.0;
+        for (T fruit : fruits) {
+            weight+=fruit.getWeight();
+        }
+        return weight;
+    }
+
+    public boolean compare(Box<?> other) {
+        return Math.abs(this.weight() - other.weight()) < 0.0001;
+    }
+
+    public void clear() {
+        fruits = new ArrayList<>();
+    }
+
+    public void pour(Box<? extends T> other) {
+        if (this == other) {
+            System.out.println("Нельзя переложить коробку саму в себя");
+            return;
+        }
+
+        List fruits = other.getFruits();
+        if (fruits == null || fruits.isEmpty()) {
+            System.out.println("Поступившая коробка пуста");
+            return;
+        }
+
+        other.clear();
+        for (Object fruit : fruits) {
+            this.fruits.add((T) fruit);
+        }
+    }
+}

src/main/java/ru/otus/java/basic/homeworks/homework19/fruit/Fruit.java

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+package ru.otus.java.basic.homeworks.homework19.fruit;
+
+public class Fruit {
+    private final double weight;
+
+    public Fruit(double weight) {
+        this.weight = weight;
+    }
+
+    public double getWeight() {
+        return weight;
+    }
+}

src/main/java/ru/otus/java/basic/homeworks/homework19/fruit/Orange.java

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+package ru.otus.java.basic.homeworks.homework19.fruit;
+
+public class Orange extends Fruit {
+    public Orange(int weight) {
+        super(weight);
+    }
+}