Handling JProgressBar Events: notification of data model changes through a ChangeListener : JProgressBar « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JProgressBar

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);
  }
}

14.32.JProgressBar
	14.32.1.	JProgressBar
	14.32.2.	Creating a JProgressBar Component with an Unknown Maximum
	14.32.3.	A progress bar is used for lengthy tasks.
	14.32.4.	Labeling a JProgressBar
	14.32.5.	Virtical JProgressBar
	14.32.6.	Creating a modal progress dialog
	14.32.7.	Set all the values at once by using the model
	14.32.8.	Using an Indeterminate JProgressBar
	14.32.9.	Displaying the Percentage Done on a JProgressBar Component
	14.32.10.	Getting and Setting the Values of a JProgressBar Component
	14.32.11.	Listening for Value Changes in a JProgressBar Component
	14.32.12.	Handling JProgressBar Events: notification of data model changes through a ChangeListener
	14.32.13.	ProgressBar and Task
	14.32.14.	SwingWorker and ProgressBar
	14.32.15.	Customizing JProgressBar Look and Feel