light_timerexpiredobserver.java

该程序是用jbuilder制作

package myoven.observer;

import myoven.timer.*;
import myoven.light.*;
/*
 为light预定计时器超时事件
 当计时器计时一满就调用关灯事件;
 */
public class Light_TimerExpiredObserver extends TimerObserver {
  Light light=Light.getInstance();//得到等的唯一实例
  public Light_TimerExpiredObserver() {
  }
  public void recieveTimerNotification() {
    light.turnOff();
  }

}