Check if a JCheckBoxMenuItem is selected in its item change listener : JCheckBoxMenuItem « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JCheckBoxMenuItem

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;

public class Main extends JFrame {
  JCheckBoxMenuItem check = new JCheckBoxMenuItem("Check");

  public Main() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JMenuBar bar = new JMenuBar();
    JMenu menu = new JMenu("Checkable");
    bar.add(menu);
    menu.add(check);

    check.addItemListener(new ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        System.out.println("Checked? " + check.isSelected());
      }
    });

    setJMenuBar(bar);
    getContentPane().add(new JLabel("A placeholder"));

    pack();
    setSize(300, 300);
    setVisible(true);
  }

  public static void main(String arg[]) {
    new Main();
  }
}

14.24.JCheckBoxMenuItem
	14.24.1.	Using JCheckBoxMenuItem: setMnemonic
	14.24.2.	Listening to JCheckBoxMenuItem Events with an ActionListener
	14.24.3.	Listening to JCheckBoxMenuItem with an ItemListener
	14.24.4.	Initialize JCheckBoxMenuItem with checked option
	14.24.5.	Check if a JCheckBoxMenuItem is selected in its item change listener
	14.24.6.	Customizing JCheckBoxMenuItem Look and Feel