elevatordoor.java

JAVA 多线程不可多得的好例子

// ElevatorDoor.java
// Opens and closes floor Door when elevator arrives and departs.
package com.deitel.jhtp5.elevator.model;

// Java core packages
import java.util.*;

// Deitel packages
import com.deitel.jhtp5.elevator.event.*;

public class ElevatorDoor extends Door implements ElevatorMoveListener {

    // open ElevatorDoor and corresponding Floor Door
   public synchronized void openDoor( Location location )
   {    
      location.getDoor().openDoor( location );
      
      super.openDoor( location );
      
   } // end method openDoor

   // close ElevatorDoor and Corresponding Floor Door
   public synchronized void closeDoor( Location location )
   {      
      location.getDoor().closeDoor( location );
      
      super.closeDoor( location );
      
   } // end method closeDoor
   
   // invoked when Elevator has departed
   public void elevatorDeparted( ElevatorMoveEvent moveEvent ) {}

   // invoked when Elevator has arrived
   public void elevatorArrived( ElevatorMoveEvent moveEvent )
   {
      openDoor( moveEvent.getLocation() );
   }
}