diff --git a/w6/AnimalTest.java b/w6/AnimalTest.java
new file mode 100644
index 0000000..92ec223
--- /dev/null
+++ b/w6/AnimalTest.java
@@ -0,0 +1,55 @@
+// 抽象类：动物
+abstract class Animal {
+    // 抽象方法：动物叫声
+    public abstract void makeSound();
+}
+
+// 接口：具备游泳能力
+interface Swimmable {
+    void swim();
+}
+
+// 狗类：继承动物，实现游泳接口
+class Dog extends Animal implements Swimmable {
+    @Override
+    public void makeSound() {
+        System.out.println("Dog: 汪汪汪");
+    }
+
+    @Override
+    public void swim() {
+        System.out.println("Dog 正在游泳");
+    }
+}
+
+// 猫类：仅继承动物
+class Cat extends Animal {
+    @Override
+    public void makeSound() {
+        System.out.println("Cat: 喵喵喵");
+    }
+}
+
+// 测试类
+public class AnimalTest {
+    public static void main(String[] args) {
+        // 多态：父类引用指向子类对象
+        Animal dog = new Dog();
+        Animal cat = new Cat();
+        // 测试叫声
+        dog.makeSound();
+        cat.makeSound();
+
+        // 测试游泳（仅狗实现了接口）
+        if (dog instanceof Swimmable) {
+            ((Swimmable) dog).swim();
+        } else {
+            System.out.println("该动物不会游泳");
+        }
+        if (cat instanceof Swimmable) {
+            ((Swimmable) cat).swim();
+        } else {
+            System.out.println("Cat 不会游泳");
+        }
+    }
+}
\ No newline at end of file
diff --git a/w6/屏幕截图 2026-04-20 114504.png b/w6/屏幕截图 2026-04-20 114504.png
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