实现一个双向适配器，使得猫可以学狗叫，狗可以学猫抓老鼠。

实验要求：

1. 对应的类图如下；

2. 提交源代码；

运行截图

package a8;  
public class adapter implements Cat,Dog{  
private Cat cat=new Realcat();  
private Dog dog=new Realdog();  
public void setcat(Cat _cat){  
cat=_cat;  
}  
public void setdog(Dog _dog){  
dog=_dog;  
}  
public void zhua(){}  
public void wang(){}  
public void run(){  
System.out.println("小狗学小猫：");  
cat.zhua();  
}  
public void cry(){  
System.out.println("小猫学小狗：");  
dog.wang();  
}  
} 
package a8;  
public class Realcat implements Cat{  
public void cry(){  
System.out.println("喵喵叫！");  
}  
public void zhua(){  
System.out.println("抓老鼠！");  
}  
}   
package a8;  
public class Realdog implements Dog{  
public void wang(){  
System.out.println("汪汪叫！");  
}  
public void run(){  
System.out.println("快快跑！");  
}  
}  
package a8;  
public interface Cat {  
public void cry();  
public void zhua();  
}  
package a8;  
public interface Dog {  
public void wang();  
public void run();  
}  
package a8;  
public class main {  
public static void main(String[] args) {  
Dog dog=new adapter();  
Cat cat=new adapter();  
dog.run();  
cat.cry();  
}   
}