Lesson_10

proJect/src/main/java/anlov/java/Box.java

@@ -0,0 +1,28 @@
+package anlov.java;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Box<T extends Fruit> {
+    private final List<T> boxWithFruit = new ArrayList<>();
+
+    public void add(T fruits, int count) {
+        for (int i = 0; i < count; i++) {
+            boxWithFruit.add(fruits);
+        }
+    }
+
+    public double getBoxWeight() {
+        return boxWithFruit.stream().mapToDouble(Fruit::getWeight).sum();
+    }
+
+    public boolean compare(Box<?> fruitsWeight) {
+        return this.getBoxWeight() == fruitsWeight.getBoxWeight();
+    }
+
+    public void exchange(Box<T> newBox) {
+        newBox.boxWithFruit.addAll(this.boxWithFruit);
+        this.boxWithFruit.clear();
+    }
+
+}

proJect/src/main/java/anlov/java/Fruit.java

@@ -0,0 +1,27 @@
+package anlov.java;
+
+public class Fruit {
+    private double weight;
+
+    public Fruit(double weight) {
+        this.weight = weight;
+    }
+
+    public double getWeight() {
+        return weight;
+    }
+}
+
+class Apple  extends Fruit{
+
+    public Apple(double weight) {
+        super(weight);
+    }
+}
+
+class Orange extends Fruit{
+
+    public Orange(double weight) {
+        super(weight);
+    }
+}

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

@@ -5,5 +5,27 @@
 
 public class Main {
     public static void main(String[] args) {
+
+        double weightApple = 1;
+        double weightOrange = 1.5;
+
+        Box<Orange> orangeBox = new Box<>();
+        orangeBox.add(new Orange(weightOrange), 7);
+        System.out.println(orangeBox.getBoxWeight());
+
+        Box<Apple> appleBox = new Box<>();
+        appleBox.add(new Apple(weightApple), 7);
+        System.out.println(appleBox.getBoxWeight());
+
+        Box<Apple> appleBox2 = new Box<>();
+        appleBox2.add(new Apple(weightApple), 8);
+        System.out.println(appleBox2.getBoxWeight());
+
+        System.out.println(appleBox.compare(appleBox2));
+
+        appleBox2.exchange(appleBox);
+        System.out.println(appleBox.getBoxWeight());
+        System.out.println(appleBox2.getBoxWeight());
+
     }
 }