Re: simple animation question (I hope)

Knute Johnson <>
Sat, 18 Nov 2006 21:27:19 -0800
John Doe wrote:

Hi. Lets say I have 3 images (image1.jpg, image2,jpg and image3.jpg).
What is the simplest way to show image1.jpg in a table cell, then 1
second later - image2.jpg, then 1 second later - image3.jpg?

I'm trying to create a time counter showing elapsed time, or maybe time
left in a graphical way, say as a bar that moves, or maybe a little dot
that moves each second. I would like to show that animation in a table
cell. Something like that.

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

public class TimePanel extends Panel implements Runnable {
     int msec;
     double percent;

     public TimePanel(int msec) {

         this.msec = msec;

         new Thread(this).start();

     public void run() {
         long stop = System.currentTimeMillis() + msec;
         while (stop > System.currentTimeMillis()) {
             try {
             } catch (InterruptedException ie) { }
             percent = 1.0 - (stop - System.currentTimeMillis()) /
         percent = 0.0;
         new Thread(this).start();

     public void update(Graphics g) {

     public void paint(Graphics g) {
         if (percent == 0.0) {

         int width = (int)(getWidth() * percent);

         String str = Integer.toString(msec) + " msec";
         FontMetrics fm = g.getFontMetrics();
         int strWidth = fm.stringWidth(str);
         g.drawString(str,(getWidth() - strWidth)/2,
          (getHeight() + fm.getHeight() / 2) / 2);

     public static void main(String[] args) {
         Frame f = new Frame();
         f.addWindowListener(new WindowAdapter() {
             public void windowClosing(WindowEvent we) {
         TimePanel tp = new TimePanel(10000);


Knute Johnson
email s/nospam/knute/

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