实验8：适配器模式

本次实验属于模仿型实验，通过本次实验学生将掌握以下内容：

1、理解适配器模式的动机，掌握该模式的结构；

2、能够利用适配器模式解决实际问题。

[实验任务一]：双向适配器

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、Cat.java

package org.example.shiyanba;

public interface Cat {
    void cry();
    void catchMouse();
}

2、Dog.java

package org.example.shiyanba;

public interface Dog {
    void wang();
    void action();
}

3、ConcreateCat.java

package org.example.shiyanba;

public class ConcreteCat implements Cat{
    @Override
    public void cry() {
        System.out.println("猫叫");
    }
    @Override
    public void catchMouse() {
        System.out.println("猫抓老鼠");
    }
}

4、ConcreateDog.java

package org.example.shiyanba;

public class ConcreteDog implements Dog{
    @Override
    public void wang() {
        System.out.println("狗叫");
    }
    @Override
    public void action() {
        System.out.println("狗学猫捉老鼠");
    }
}

5、Adapter.java

package org.example.shiyanba;

public class Adapter implements Dog,Cat{
    private Cat cat;
    private Dog dog;
    public Cat getCat() {
        return cat;
    }
    public void setCat(Cat cat) {
        this.cat = cat;
    }
    public Dog getDog() {
        return dog;
    }
    public void setDog(Dog dog) {
        this.dog = dog;
    }
    @Override
    public void cry() //猫学狗叫
    {
        System.out.print( "猫学");
        dog.wang();
    }
    @Override
    public void catchMouse() {
        cat.catchMouse();
    }
    @Override
    public void wang() {
        dog.wang();
    }
    @Override
    public void action() //狗学猫抓老鼠
    {
        System.out.print( "狗学");
        cat.catchMouse();
    }
}

6、Test.java

package org.example.shiyanba;

public class Test {
    public static void main(String args[])
    {
        Cat cat1 = new ConcreteCat();
        Dog dog1 = new ConcreteDog();
        Adapter A1 = new Adapter();
        A1.setCat(cat1);
        A1.setDog(dog1);
        cat1 = (Cat) A1;
        cat1.catchMouse();
        cat1.cry();
        dog1 = (Dog) A1;
        dog1.action();
    }
}