SwingProgressBarExample.java Source code

Introduction

Here is the source code for SwingProgressBarExample.java

Source

/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly 
*/
// SwingProgressBarExample.java
// A demonstration of the JProgressBar component. The component tracks the
// progress of a for loop.
//

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.SwingUtilities;

public class SwingProgressBarExample extends JPanel {

    JProgressBar pbar;

    static final int MY_MINIMUM = 0;

    static final int MY_MAXIMUM = 100;

    public SwingProgressBarExample() {
        pbar = new JProgressBar();
        pbar.setMinimum(MY_MINIMUM);
        pbar.setMaximum(MY_MAXIMUM);
        add(pbar);
    }

    public void updateBar(int newValue) {
        pbar.setValue(newValue);
    }

    public static void main(String args[]) {

        final SwingProgressBarExample it = new SwingProgressBarExample();

        JFrame frame = new JFrame("Progress Bar Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(it);
        frame.pack();
        frame.setVisible(true);

        for (int i = MY_MINIMUM; i <= MY_MAXIMUM; i++) {
            final int percent = i;
            try {
                SwingUtilities.invokeLater(new Runnable() {
                    public void run() {
                        it.updateBar(percent);
                    }
                });
                java.lang.Thread.sleep(100);
            } catch (InterruptedException e) {
                ;
            }
        }
    }
}