/* A class with one thread, implementing a Digital Clock */

import java.awt.Graphics;
import java.awt.Font;
import java.util.Date;

public class DigitalClock extends java.applet.Applet implements Runnable 
{
  Font theFont = new Font("TimesRoman",Font.BOLD,24);
  Date theDate;
  Thread runner;

  // override the applet start method
  public void start() 
  {
      // construct an instance of a thread and use the run method
      // from "this" applet
      runner = new Thread(this);
      runner.start();  // call the thread start method
  }

  // override the applet stop method
  public void stop() 
  {
      runner = null;
  }

  // provide a method run to be the body of the thread 
  // this method required by the runnable interface
  public void run() 
  {
    Thread thisThread = Thread.currentThread();
    while (runner == thisThread) 
    {
      theDate = new Date();
      // this method will call applet method update, 
      //      which will call paint below
      repaint();
      // current thread will sleep for 1 second
      try { thisThread.sleep(1000); }
      catch (InterruptedException e) { }
    }
  }

  // provide the applet paint method
  public void paint(Graphics g) 
  {
    g.setFont(theFont);
    g.drawString(theDate.toString(),10,50);
  }
}