How to count down seconds??

[sjohri214]

Hi,

The question I have is, if I have declared an int value (the value 20 for example), how can i make a counter to count down from 20 seconds down to zero?

Any Help would be much appreciated

Thanks

 

[palbano]

what do u mean counter

if u want to delay 20 seconds do
Thread.sleep(20 * 1000);

-pete

 

[sjohri214]

Hi Pete,

Thanks for the response.
Although I would like to produce a counter in order that I can display to the user how long it will take for the task to be completed.

 

[JVZ]

here is a sample to get you started, hope this helps....

import java.awt.*;
import java.awt.event.*;

public class Counter extends java.applet.Applet implements ActionListener, Runnable {
   TextField field;
   int bits    = 0;
   int seconds = 20;
   int minutes = 0;
   boolean interrupt;
   Thread stopwatch = null;
   String str = "";
public void init() {
      field = new TextField(32);
      field.setEditable(false);
      setFont(new Font("Arial", 0, 14));
      Button start = new Button("Start");
      Button stop = new Button("Stop");
      start.addActionListener(this);
      stop.addActionListener(this);
      add(field);
      add(start);
      add(stop);
}
   public void paint(Graphics g)	{
      g.setColor(Color.blue);
      g.setFont(new Font("Arial", 0, 18));
      g.fillRect(5, 3, 540, 54);
      g.setColor(Color.yellow);
      g.drawString("Timer : ", 15, 25);
      g.drawString(str, 15, 50);
	}

public void actionPerformed(ActionEvent e) {
   String comm = e.getActionCommand();
      if(comm.equals("Start")) {
         interrupt = true;
         start();
      }
      if(comm.equals("Stop")) {
         interrupt = false;
         if (seconds > 0) str = "Question completed: " + field.getText();
         else str = "Sorry out of time.";
      }
   repaint();
}
   public void start() {
      if(stopwatch == null) {
         stopwatch = new Thread(this, "StopWatchApplet");
         stopwatch.start();
      }
   }
   public void run() {
      Thread thread = Thread.currentThread();
         while (stopwatch == thread)
         {
            try
            {
               while(seconds != 0 && interrupt)
               {
                  Thread.sleep(10);
                  bits++;
                     if(bits % 100 == 0 && bits != 0)
                     {
                        bits -= 100;
                        seconds--;
                     }

               		if(!interrupt) --bits;
               		field.setText(+minutes+" mins : "+seconds+" secs: "+bits+" hundreds of a second.");


				}

		   }
		   catch(Exception ignore) { }
        }

   }
   public void update(Graphics g) { paint(g); }
}