How do I make the time tick backwards?

Hi guys,
I'm trying to create an applet that will display some kind of timer. Basically I need it to decrement the time every second, so it looks like a countdown of some sort. I have some code for the time to tick forward... but I have no idea how to make it tick backwards. Any help would be appreciated.

Here is what I have so far,

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

public class example extends Applet implements Runnable
{
    Date d;
    Thread runner;  
   
     public void init()
     {          
          setLayout(null);
          setSize(420,250);          
     }
     
     public void start()
     {
         if(runner == null)
         {
             runner = new Thread(this);
             runner.start();
         }
     }
     
     public void stop()
     {
         if(runner != null)
         {
             runner.stop();
             runner = null;
         }
     }
     
     public void run()
     {        
         while(true)
         {
             d = new Date();      
             repaint();
             try
             {
                 runner.sleep(1000);
             }
             catch(InterruptedException e)
             {
                 System.out.println(e);
             }
         }
     }
     
     public void paint(Graphics g)
     {
         g.drawString(d.toString() , 5, 100);        
     }
}
tixnmixAsked:
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objectsConnect With a Mentor Commented:
woops, two changes required:

1. Initialise d at the start (line 7(ish))

d = new Date();

2. Change the setTime call to:

d.setTime(start.getTime() - (new Date().getTime() - start.getTime()));

See how that goes.
0
 
objectsCommented:
Replace your run() method with the following:


    public void run()
    {
        Date start = new Date();        
        while(true)
        {
            d.setTime(new Date().getTime() - start.getTime());      
            repaint();
            try
            {
                runner.sleep(1000);
            }
            catch(InterruptedException e)
            {
                System.out.println(e);
            }
        }

Let me know if u have any problems :)

0
 
tixnmixAuthor Commented:
Thanks for the reply, but I cant seem to get it to work though. =(
nothing is showing up on the applet...
0
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tixnmixAuthor Commented:
Ah !! Thanks a lot, that did it. =)
0
 
objectsCommented:
No worries.
Thanks for the points :)
0
 
kylarCommented:
That's a good hack. I think that there should be some kind of reverse flag that allows you to create a Timer (for example) and have it tick in reverse. Objects, you've given me some food for thought. (And it's too early on monday for that)

Kylar

"Time keeps on tickin', tickin', tickin', into the future..."
    -Steve Miller, 'Fly Like an Eagle'
0
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