适配器模式

Taget

package com.learning.designpattern.adapter;

public class Target {
    
    public void operation(){
        System.out.println("target operation");
    }
    

}

Adaptee

package com.learning.designpattern.adapter;

public class Adaptee {

    public void request(){
        System.out.println("real request");
    }
}

Adapter

package com.learning.designpattern.adapter;

public class Adapter extends Target {
    
    private Adaptee adaptee;
    
    @Override
    public void operation() {
        if(adaptee==null){
            adaptee = new Adaptee();
        }
        adaptee.request();

    }


}

Client：

package com.learning.designpattern.adapter;

public class Client {

    /**
     * @param args
     */
    public static void main(String[] args) {
        Target target = new Adapter();
        target.operation();

    }

}