Java tutorial
import java.awt.BorderLayout; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.ButtonModel; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; public class Main extends JFrame { JButton b = new JButton("Test"); ButtonModel model = b.getModel(); public Main() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); model.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent e) { System.out.println("Armed: " + model.isArmed() + " Enabled: " + model.isEnabled() + " Pressed: " + model.isPressed()); } }); getContentPane().add(b, BorderLayout.CENTER); pack(); setVisible(true); } public static void main(String arg[]) { new Main(); } }