import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
class BoundedChangeListener implements ChangeListener {
public void stateChanged(ChangeEvent changeEvent) {
Object source = changeEvent.getSource();
if (source instanceof JProgressBar) {
JProgressBar theJProgressBar = (JProgressBar) source;
System.out.println("ProgressBar changed: " + theJProgressBar.getValue());
} else {
System.out.println("Something changed: " + source);
}
}
}
public class ProgressBarStepBoundedChangeListener {
public static void main(String args[]) throws Exception {
JFrame frame = new JFrame("Stepping Progress");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JProgressBar aJProgressBar = new JProgressBar(JProgressBar.VERTICAL);
aJProgressBar.setStringPainted(true);
aJProgressBar.addChangeListener(new BoundedChangeListener());
for (int i = 0; i < 10; i++) {
aJProgressBar.setValue(i++);
Thread.sleep(100);
}
frame.add(aJProgressBar, BorderLayout.NORTH);
frame.setSize(300, 200);
frame.setVisible(true);
}
}