clock.java

java课件及例程有一些PPT及一些例程

import java.awt.Graphics;
import java.util.Date;
import java.applet.*;

public class clock extends Applet implements Runnable {
   Thread clockThread ;
   public void start () {
         if (clockThread == null)
         clockThread = new Thread(this,"clock");
         clockThread.start();
   }
   
   public void run (){
         while ( clockThread != null) {
        repaint();
        try{
             clockThread.sleep(1000);
           }catch(InterruptedException e){
             return;
           }
       }  
   }
   
   public void paint(Graphics g) {
       Date now =new Date();
       g.drawString(now.getHours()+":"+now.getMinutes()+":"+now.getSeconds(),5,10);  
   }
   public void stop() {
        clockThread.stop();
        clockThread = null;
   }

}