Need simple progress bar

Question

Hi...
I have a GUI which calls methods in different classes.
There are three long running tasks, which I want to be able to display the progress of.
Each task MUST finish before the other proceeds, so I don't think it is necessary for more than one thread.
I want to have a simple "progress bar" pop-up when each task starts, and then disappear when it is finished. Or, have a "progress indicator" on the GUI, which can be reset and started again.
I have played around with JProgressBars and JProgressMonitors (from this site), but haven't been able to adapt them to the simple needs.
Is there any hope for what I want to achieve?
You would have thought this was an easy task, but I'm a broken man!
Thanks for any help.

Answer 1

Maybe this example will help.
If it does may I claim the duke dollars please
* ProgressDLG.java
* Created on 23 April 2004, 13:38
package com.starjar.tests.progress;
* @author  Peter Henderson
public class ProgressDLG extends javax.swing.JDialog {
    /** Creates new form ProgressDLG */
    public ProgressDLG(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;
        jButton1 = new javax.swing.JButton();
        jProgressBar1 = new javax.swing.JProgressBar();
        jLabel1 = new javax.swing.JLabel();
        getContentPane().setLayout(new java.awt.GridBagLayout());
        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
        jButton1.setText("Start");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridy = 5;
        getContentPane().add(jButton1, gridBagConstraints);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridy = 2;
        getContentPane().add(jProgressBar1, gridBagConstraints);
        jLabel1.setText("jLabel1");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridy = 1;
        getContentPane().add(jLabel1, gridBagConstraints);
        pack();
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        jButton1.setEnabled(false);
        Worker w = new Worker();
        w.start();
    class Worker extends Thread {
        public void run() {
            task1();
            task2();
            task3();
            workerComplete();
        private void workerComplete() {
            try {
                javax.swing.SwingUtilities.invokeAndWait( new Runnable() {
                    public void run() {
                        jButton1.setEnabled(true);
            } catch(Exception e ) {
                // oh well.
        private void setTaskNameFromWorker(final String taskName) {
            try {
                javax.swing.SwingUtilities.invokeAndWait( new Runnable() {
                    public void run() {
                        jLabel1.setText( taskName );
            } catch(Exception e ) {
                // oh well.
        private void setProgressFromWorker(final int progress) {
            try {
                javax.swing.SwingUtilities.invokeAndWait( new Runnable() {
                    public void run() {
                        jProgressBar1.setValue(progress);
            } catch(Exception e ) {
                // oh well.
        private void task1() {
            setTaskNameFromWorker("Running Task ONE");
            for(int i=0; i<100; i++) {
                setProgressFromWorker(i);
                try{ Thread.currentThread().sleep(25); } catch(Exception e) {}
        private void task2() {
            setTaskNameFromWorker("Running Task TWO");
            for(int i=0; i<100; i++) {
                setProgressFromWorker(i);
                try{ Thread.currentThread().sleep(25); } catch(Exception e) {}
        private void task3() {
            setTaskNameFromWorker("Running Task THREE");
            for(int i=0; i<100; i++) {
                setProgressFromWorker(i);
                try{ Thread.currentThread().sleep(25); } catch(Exception e) {}
     * @param args the command line arguments
    public static void main(String args[]) {
        new ProgressDLG(new javax.swing.JFrame(), true).show();
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JProgressBar jProgressBar1;
    // End of variables declaration
}Peter Henderson
Sales Manager
Starjar Ltd
http://www.starjar.com