Bounded Range Components - The Definitive Guide to Java Swing - page 436

public BarThread(JProgressBar bar) {
progressBar = bar;
}
public void run() {
int minimum = progressBar.getMinimum();
int maximum = progressBar.getMaximum();
Runnable runner = new Runnable() {
public void run() {
int value = progressBar.getValue();
progressBar.setValue(value+1);
}
};
for (int i=minimum; i<maximum; i++) {
try {
EventQueue.invokeAndWait(runner);
// Our job for each step is to just sleep
Thread.sleep(DELAY);
} catch (InterruptedException ignoredException) {
} catch (InvocationTargetException ignoredException) {
}
}
}
}
public static void main(String args[]) {
Runnable runner = new Runnable() {
public void run() {
JFrame frame = new JFrame("Stepping Progress");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JProgressBar aJProgressBar = new JProgressBar(0, 50);
aJProgressBar.setStringPainted(true);
final JButton aJButton = new JButton("Start");
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
aJButton.setEnabled(false);
Thread stepper = new BarThread(aJProgressBar);
stepper.start();
}
};