Add change listener for JToggleButton in Java

/*from w  w  w. ja  va  2 s . c o m*/
  
import java.awt.BorderLayout;

import javax.swing.AbstractButton;
import javax.swing.ButtonModel;
import javax.swing.JFrame;
import javax.swing.JToggleButton;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    JToggleButton toggleButton = new JToggleButton("Selected");

    ChangeListener changeListener = new ChangeListener() {
      public void stateChanged(ChangeEvent changeEvent) {
        AbstractButton abstractButton = (AbstractButton) changeEvent
            .getSource();
        ButtonModel buttonModel = abstractButton.getModel();
        boolean armed = buttonModel.isArmed();
        boolean pressed = buttonModel.isPressed();
        boolean selected = buttonModel.isSelected();
        System.out.println("Changed: " + armed + "/" + pressed + "/"
            + selected);
      }
    };
    toggleButton.addChangeListener(changeListener);
    frame.add(toggleButton, BorderLayout.NORTH);

    frame.setSize(300, 125);
    frame.setVisible(true);
  }
}