Get datetime to a JFrame...

Question

i need to get the current system date & time to JFrame (to display)...also it should change dynamically according to the systems date&time
(i.e it should change from second to second...)
i tried it with a JApplet (call the JApplet in-side the JFrame...)
Like this...
//JApplet
String lastTime = "";
GregorianCalendar day = new GregorianCalendar();
String time = day.getTime().toString();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// do nothing
lastTime = time;
repaint();
//JFrame
     BorderLayout bord=new BorderLayout();
     getContentPane().setLayout(bord);
     appletTest aT=new appletTest();     //instance from JApplet
     getContentPane().add("Center",aT);
But, here it is not erase the previous value...It just overlap...
(if seconds...2 is overlap with 1....then 3 is overlap with 2)
How to avoid this...
OR
Is there other way of get the date&time to a JFrame.
pls...tell
thanks

Answer 1

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.util.*;
import java.applet.*;
<Applet code=AppletDate.class width=500 height=400>
</Applet>
public class AppletDate extends Applet implements Runnable
GregorianCalendar cal;
Thread thread=null;
Date date;
public void start()
       if(thread==null)
            thread=new Thread(this);
            thread.start();
     }//start
     public void run()
          while(thread!=null)
               repaint();
               try
                    thread.sleep(1000);
               catch (Exception E)
                    System.out.println(E);
               }//catch
          }//while
     }//run
     public void paint(Graphics g)
          String time;
        date=new Date();
          GregorianCalendar cal=new GregorianCalendar();
          cal.setTime(date);
          time=cal.get(cal.HOUR)+":"+cal.get(cal.MINUTE)+":"+cal.get(cal.SECOND);
          g.drawString(time,30,30);
}