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// 狗:继承动物类,实现游泳接口
public class Dog extends Animal implements Swimmable {
// 重写抽象方法:发出叫声
@Override
public void makeSound() {
System.out.println("汪汪汪!");
}
// 实现接口方法:游泳
@Override
public void swim() {
System.out.println("狗在水里欢快地游泳~");
}
}