适配器模式——java实现

问题描述：

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。

类图：

Java代码：

//Cat.java
package shiyan8;

public interface Cat {    
    public void cry();
    public void zhua();
}
 //Dag.java
package shiyan8;

public interface Dog {
    public void wang();
    public void run();
} 
//Realcat.java
package shiyan8;

public class Realcat implements Cat{
    public void cry(){
        System.out.println("喵喵叫！");
    }
    public void zhua(){
        System.out.println("抓老鼠！");
    }
} 
//Realdog.java
package shiyan8;

public interface Dog {
    public void wang();
    public void run();
} 
//Adapter.java
package shiyan8;

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();
    }
} 
//main.java
package shiyan8;

public class main {

    public static void main(String[] args) {
        Dog dog=new Adapter();
        Cat cat=new Adapter();
        dog.run();
        cat.cry();
    } 
}

运行结果：