Java Swing How to - Check if a JCheckBoxMenuItem is selected in its item change listener

Question

We would like to know how to check if a JCheckBoxMenuItem is selected in its item change listener.

Answer

 /*from  w  ww. jav a2 s .  c  o  m*/
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();
  }
}