diff --git a/w6/Animalsound.java.java b/w6/Animalsound.java.java
new file mode 100644
index 0000000..be09a57
--- /dev/null
+++ b/w6/Animalsound.java.java
@@ -0,0 +1,39 @@
+package w6;
+
+abstract class Animal {
+    public abstract void makeSound();
+}
+interface Swimmable{
+    void swim();
+}
+class Dog extends Animal implements Swimmable{
+    @Override
+    public void makeSound() {
+        System.out.println("汪汪汪");
+    }
+    @Override
+    public void swim() {
+        System.out.println("狗会游泳");
+    }
+}
+class Cat extends Animal {
+    @Override
+    public void makeSound() {
+        System.out.println("喵喵喵");
+    }
+public class Test{
+    public static void main(String[] args) {
+        Animal dog = new Dog();
+        dog.makeSound();
+        ((Swimmable) dog).swim();
+        Animal cat = new Cat();
+        cat.makeSound();
+
+    }
+}
+
+
+    
+    
+}
+