抽象类

/**
 * @Author: chuan.bai
 * @Description  制作面条抽象类
 * @Date: Created on 16:55 2021/4/1
 * @Modified By:
 */
public abstract class NoodlesAbstract {

    /**
     * 制作面条的方法
     */
    abstract void  process();


}

基础类

/**
 * @Author: chuan.bai
 * @Description  制作普通面条
 * @Date: Created on 16:58 2021/4/1
 * @Modified By:
 */
public class NormalNoodles extends NoodlesAbstract{
    @Override
    void process() {
        System.out.println("制作普通面条");
    }
}

装饰器

/**
 * @Author: chuan.bai
 * @Description  面条装饰器
 * @Date: Created on 17:01 2021/4/1
 * @Modified By:
 */
public abstract class Decorator extends NoodlesAbstract{

   private NoodlesAbstract noodlesAbstract;


    public Decorator(NoodlesAbstract noodlesAbstract) {
        this.noodlesAbstract = noodlesAbstract;
    }

    @Override
    void process() {
        noodlesAbstract.process();
    }

}

/**
 * @Author: chuan.bai
 * @Description 加西红柿的面
 * @Date: Created on 17:05 2021/4/1
 * @Modified By:
 */
public class EggNoodles extends Decorator {
    public EggNoodles(NoodlesAbstract noodlesAbstract) {
        super(noodlesAbstract);
    }
    @Override
    public void process() {
        super.process();
        System.out.println("加鸡蛋");
    }

}

/**
 * @Author: chuan.bai
 * @Description 加西红柿
 * @Date: Created on 17:05 2021/4/1
 * @Modified By:
 */
public class TomatoNoodles extends Decorator {

    public TomatoNoodles(NoodlesAbstract noodlesAbstract) {
        super(noodlesAbstract);
    }

    @Override
    public void process() {
        super.process();
        System.out.println("加西红柿");
    }

}

客户端

/**
 * @Author: chuan.bai
 * @Description
 * @Date: Created on 17:06 2021/4/1
 * @Modified By:
 */
public class Client {

    public static void main(String[] args) {
        NormalNoodles normalNoodles = new NormalNoodles();
        TomatoNoodles  tomatoNoodles = new TomatoNoodles(normalNoodles);
        tomatoNoodles.process();
        EggNoodles eggNoodles = new EggNoodles(tomatoNoodles);
        eggNoodles.process();
    }
}

输出结果

制作普通面条
加西红柿
制作普通面条
加西红柿
加鸡蛋

Process finished with exit code 0