装饰者模式

1、定义一个Worker接口

<span style="font-size:18px;">interface Worker{void doSomeWork();}</span>

2、定义一个水管工类Plumber

<span style="font-size:18px;">class Plumber implements Worker{public void doSomeWork(){System.out.println("修水管");}}</span>

3、定义一个木匠Canpenter

class Canpenter implements Worker{public void doSomeWork(){System.out.println("修门窗");}}

4、A公司，都要说你好

class AWorker implements Worker{private Worker worker;AWorker(Worker worker){this.worker = worker;}public void doSomeWork(){System.out.println("你好");worker.doSomeWork();}}

5、测试

class TestWorker{public static void main(String args []){Canpenter canpenter = new Canpenter();AWorker aworker1 = new AWorker(canpenter);aworker1.doSomeWork();Plumber plumber = new Plumber();AWorker aworker2 = new AWorker(plumber);aworker2.doSomeWork();}}