showseconds.java

java语言与面向对象程序设计源程序

import java.util.Date;
public class ShowSeconds implements Runnable
{  private Thread clocker = null;
   private Date now = new Date();
   public ShowSeconds()
   {  clocker = new Thread(this);
      clocker.start();
   }
   public void run()
   {  while (true)
      {  now = new Date();
         System.out.println(now);
         try
         {  clocker.sleep(1000); }
         catch(InterruptedException ie)
         {  System.err.println("Thread error: " + ie); }
      }
   }
   public static void main(String args[])
   {   ShowSeconds time = new ShowSeconds(); }
}