设计模式——适配器模式

一、任务

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。

 

二、类图

三、代码

1、Java

package tutorial8;

public class Adapter implements Dog,Cat {
    Dog dog=null;
    Cat cat=null;
    public Adapter(Cat cat) {
        this.cat=cat;
    }
    public Adapter(Dog dog) {
        this.dog=dog;
    }
    @Override
    public void bark() {
        // TODO 自动生成的方法存根
        cat.catchMouse();
        
    }
    @Override
    public void catchMouse() {
        // TODO 自动生成的方法存根
        dog.bark();
    }
    @Override
    public void catLook() {
        // TODO 自动生成的方法存根
        System.out.println("这只小动物看起来是小狗");
    }
    @Override
    public void dogLook() {
        // TODO 自动生成的方法存根
        System.out.println("这只小动物看起来是小猫");
    }
    
}

package tutorial8;

public interface Cat {

    public void catchMouse();
    public void catLook();
}

package tutorial8;

public interface Dog {
    public void bark() ;
    public void dogLook() ;
}

package tutorial8;

public class CatTarget implements Cat {
    public void catLook() {
        System.out.println("这是一只小猫咪");
    }

    @Override
    public void catchMouse() {
        // TODO 自动生成的方法存根
        System.out.println("小猫抓老鼠的技能！！！");
    }
    
}

package tutorial8;

public class DogTarget implements Dog {

    public void dogLook() {
        System.out.println("这是一只小狗");
    }

    @Override
    public void bark() {
        // TODO 自动生成的方法存根
        System.out.println("小狗汪汪叫的技能");
    }
}

package tutorial8;

public class Client {
    public static void main(String[] args) {
        System.out.println("看到一只小动物：");
        //把狗设配成猫
        Cat fakercat=new Adapter(new DogTarget());
        fakercat.catLook();
        System.out.print("小狗学习猫咪");
        fakercat.catchMouse();
        //把猫设配成狗
        Dog fakerdog=new Adapter(new CatTarget());
        System.out.println("******************************");
        System.out.println("又看到一只小动物：");
        fakerdog.dogLook();
        
        System.out.print("猫咪学习小狗");
        fakerdog.bark();
    }


}

2、C++

#include<iostream>
using namespace std;



class Dog
{
public:
    virtual void bark() {};
    virtual void dogLook() {};

}; 
class Cat
{
public:
    virtual void catchMouse() {};
    virtual void catLook() {};
};

class DogTarget:public Dog {
public:
    void dogLook() {
        cout<<"这是一只小狗"<<endl;
    }

    
    void bark() {
        // TODO 自动生成的方法存根
        cout<<"小狗汪汪叫的技能"<<endl;
    }
};
class CatTarget :public Cat {
public:
    void catLook() {
        cout<<"这是一只小猫咪"<<endl;
    }


    void catchMouse() {
        
        cout<<"小猫抓老鼠的技能！！！"<<endl;
    }
};

class Adapter :public Dog, public Cat {
    Dog dog ;
    Cat cat;
public:
    Adapter(Cat *cat1) {
        cat = *cat1;
    }
    Adapter(Dog *dog1) {
        dog = *dog1;
    }

    void bark() {

        cat.catchMouse();

    }
    
    void catchMouse() {

        dog.bark();
    }

    void catLook() {

        cout<<"这只小动物看起来是小狗"<<endl;
    }

    void dogLook() {
    
        cout<<"这只小动物看起来是小猫"<<endl;
    }
};
void main() {
    cout << "看到一只小动物：" << endl;
    //把狗设配成猫
    Cat* fakercat = new Adapter(new DogTarget());
    fakercat->catLook();
    cout << "小狗学习猫咪" << endl;
    fakercat->catchMouse();
    //把猫设配成狗
    Dog* fakerdog = new Adapter(new CatTarget());
    cout << "******************************" << endl;
    cout << "又看到一只小动物：" << endl;
    fakerdog->dogLook();

    cout << "猫咪学习小狗" << endl;
    fakerdog->bark();
}

四、结果截图

1、Java

2、C++