door.java

该程序是用jbuilder制作

package myoven.door;

import java.util.*;
public class Door {
  Vector Observers_DoorOpen; //预定开门者集合
  Vector Observers_DoorClose;//预定关门者集合
  boolean isOpen;
  public boolean getIsOpen(){//返回门的状态
    return isOpen;
  }
  public Door() {
    isOpen=false;//初始默认是门是关闭的
    Observers_DoorOpen=new Vector();
    Observers_DoorClose=new Vector();
  }
  public void open(){//通知所有预定了开门事件的观察者
    isOpen=true;//门开了
    for(int i=0;i<Observers_DoorOpen.size();i++){
      ((DoorOpenObserver)Observers_DoorOpen.elementAt(i)).recieveDoorOpenNotification();
    }
  }
  public void close(){//通知所有预定了关门事件的观察者
    isOpen=false;//门关了
    for(int i=0;i<Observers_DoorClose.size();i++){
      ((DoorCloseObserver)Observers_DoorClose.elementAt(i)).recieveDoorCloseNotification();
    }
  }
  public void subscribeDoorOpen(Object obt){ //为观察者预定开门事件
    Observers_DoorOpen.add(obt);
  }
  public void subscribeDoorClose(Object obt){//为观察者预定关门事件
    Observers_DoorClose.add(obt);
  }
  public void unsubscribeDoorOpen(Object obt){//撤消预定开门事件
    Observers_DoorOpen.remove(obt);
  }
  public void unsubscribeDoorClose(Object obt){//撤消预定关门事件
    Observers_DoorClose.remove(obt);
  }
}