first commit

level3.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+

src/Geekbrains/Main.java

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+package Geekbrains;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+public class Main {
+    public static void main(String[] args) {
+    }
+}
+class ArrayTask {
+    //1
+    public static void arrToSwap(Object[] array, int a, int b) {
+        Object tmp = array[a];
+        array[a] = array[b];
+        array[a] = tmp;
+    }
+    //2
+    public <T> ArrayList convert(T[] array) {
+        return new ArrayList<>(Arrays.asList(array));
+    }
+}
+    // 3
+    class Fruit {
+        private float weight;
+
+        public Fruit(float weight) {
+            this.weight = weight;
+        }
+
+        float getWeight() {
+            return weight;
+        }
+    }
+    class Apple <T> extends Fruit  {
+        public Apple(float weight) {
+            super(weight);
+        }
+
+    }
+    class Orange <T> extends Fruit {
+        public Orange(float weight) {
+            super(weight);
+        }
+    }
+
+    class Box <T extends Fruit>  {
+        // Складываем  фрукты одного типа
+         private ArrayList <T> arrayList;
+        // конструктор на один или несколько фрутов
+        public Box() {
+            this.arrayList = new ArrayList<>();
+        }
+        public Box(T... fruits) {
+            this.arrayList = new ArrayList<>(Arrays.asList(fruits));
+        }
+        // вес
+        public float getWeight() {
+            float weight = 0.0f;
+            for (T o : arrayList) {
+                weight += o.getWeight();
+            }
+            return weight;
+        }
+        // сравнить
+        public boolean compare(Box <?> box){
+            return (this.getWeight()-box.getWeight() < 0.0001);
+        }
+        // добавить
+        public void add(T fruit) {
+            arrayList.add(fruit);
+        }
+        // перемещение
+        public void sprinkle(Box<T> another) {
+        another.arrayList.addAll(arrayList);
+        arrayList.clear();
+    }
+}
+
+