Add item state changed listener for JToggleButton in Java

// w  w  w  . j av a2  s  .co  m
  
import java.awt.BorderLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JFrame;
import javax.swing.JToggleButton;

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

    ItemListener itemListener = new ItemListener() {
      public void itemStateChanged(ItemEvent itemEvent) {
        int state = itemEvent.getStateChange();
        if (state == ItemEvent.SELECTED) {
          System.out.println("Selected");
        } else {
          System.out.println("Deselected");
        }
      }
    };
    toggleButton.addItemListener(itemListener);
    frame.add(toggleButton, BorderLayout.NORTH);

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