上传文件至 'W6'

W6/AnimalTest.java

@@ -0,0 +1,26 @@
+public class AnimalTest {
+    public static void main(String[] args) {
+        // 创建动物数组，演示多态
+        Animal[] animals = new Animal[2];
+        animals[0] = new Dog();
+        animals[1] = new Cat();
+        
+        // 测试多态调用makeSound方法
+        System.out.println("测试动物叫声：");
+        for (Animal animal : animals) {
+            animal.makeSound();
+        }
+        
+        // 测试Dog的swim方法
+        System.out.println("\n测试游泳能力：");
+        if (animals[0] instanceof Swimmable) {
+            ((Swimmable) animals[0]).swim();
+        }
+        
+        if (animals[1] instanceof Swimmable) {
+            ((Swimmable) animals[1]).swim();
+        } else {
+            System.out.println("猫不会游泳！");
+        }
+    }
+}

W6/Cat.java

@@ -0,0 +1,6 @@
+public class Cat extends Animal {
+    @Override
+    public void makeSound() {
+        System.out.println("喵喵喵！");
+    }
+}

W6/Dog.java

@@ -0,0 +1,11 @@
+public class Dog extends Animal implements Swimmable {
+    @Override
+    public void makeSound() {
+        System.out.println("汪汪汪！");
+    }
+    
+    @Override
+    public void swim() {
+        System.out.println("狗在游泳！");
+    }
+}

W6/Swimmable.java

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+public interface Swimmable {
+    void swim();
+}