anonymousinnerclasstest.java

这是java2核心技术第七版的源代码

/**
   @version 1.10 2004-02-27
   @author Cay Horstmann
*/

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.Timer;

public class AnonymousInnerClassTest
{    
   public static void main(String[] args)
   {  
      TalkingClock clock = new TalkingClock();
      clock.start(1000, true);

      // keep program running until user selects "Ok"
      JOptionPane.showMessageDialog(null, "Quit program?");
      System.exit(0);
   }
}

/**
   A clock that prints the time in regular intervals.
*/
class TalkingClock
{  
   /**
      Starts the clock.
      @param interval the interval between messages (in milliseconds)
      @param beep true if the clock should beep
   */
   public void start(int interval, final boolean beep)
   {
      ActionListener listener = new 
         ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {  
               Date now = new Date();
               System.out.println("At the tone, the time is " + now);
               if (beep) Toolkit.getDefaultToolkit().beep();
            }
         };
      Timer t = new Timer(interval, listener);
      t.start();
   }
}