装饰器模式

package com.kang.patterndesign.decorator;

/**
 * @author klr
 * @create 2020-09-28-11:39
 */
public class DecoratorTest {
    public static void main(String[] args) {
        //对原有的第一代机器人进行装饰
        new OtherDecorator(new RobotOne()).doMoreThing();
    }
}

//机器人接口
interface Robot {
    void doSomething();
}

//第一代机器人
class RobotOne implements Robot {

    @Override
    public void doSomething() {
        System.out.println("唱歌");
    }
}

//使用装饰器模式，在第一代机器人身上扩展
abstract class RobotDecorator implements Robot {

    //组合
    private Robot robot;
    //使用构造器把第一代机器人传进来

    public RobotDecorator(Robot robot) {
        this.robot = robot;
    }

    @Override
    public void doSomething() {
        robot.doSomething();
    }

    public void doMoreThing() {
        robot.doSomething();
        System.out.println("跳舞");
    }
}

class OtherDecorator extends RobotDecorator {

    public OtherDecorator(Robot robot) {
        super(robot);
    }
}