Listen for Value Changes in a JProgressBar Component in Java
Description
The following code shows how to listen for Value Changes in a JProgressBar Component.
Example
import java.awt.BorderLayout;
// w ww. ja va2 s.com
import javax.swing.JFrame;
import javax.swing.JProgressBar;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Main extends JFrame {
public Main() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
int minimum = 0;
int maximum = 100;
JProgressBar progress = new JProgressBar(minimum, maximum);
progress.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent evt) {
JProgressBar comp = (JProgressBar) evt.getSource();
int value = comp.getValue();
System.out.println(value);
int min = comp.getMinimum();
int max = comp.getMaximum();
}
});
progress.setValue(20);
getContentPane().add(progress, BorderLayout.NORTH);
pack();
setVisible(true);
}
public static void main(String arg[]) {
new Main();
}
}
The code above generates the following result.
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