Java JCheckBox MenuItem

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import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ItemEvent;
import java.awt.event.KeyEvent;
import javax.swing.BorderFactory;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;

public class JavaJCheckBoxMenuItem extends JFrame {

	private JLabel statusbar;

	public JavaJCheckBoxMenuItem() {

		initUI();
	}

	private void initUI() {

		createMenuBar();

		statusbar = new JLabel("Ready");
		statusbar.setBorder(BorderFactory.createEtchedBorder());
		add(statusbar, BorderLayout.SOUTH);

		setTitle("JCheckBoxMenuItem");
		setSize(360, 250);
		setLocationRelativeTo(null);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}

	private void createMenuBar() {

		JMenuBar menubar = new JMenuBar();
		JMenu fileMenu = new JMenu("File");
		fileMenu.setMnemonic(KeyEvent.VK_F);

		JMenu viewMenu = new JMenu("View");
		viewMenu.setMnemonic(KeyEvent.VK_V);

		JCheckBoxMenuItem sbarMi = new JCheckBoxMenuItem("Show statubar");
		sbarMi.setMnemonic(KeyEvent.VK_S);
		sbarMi.setDisplayedMnemonicIndex(5);
		sbarMi.setSelected(true);

		sbarMi.addItemListener((ItemEvent e) -> {
			if (e.getStateChange() == ItemEvent.SELECTED) {
				statusbar.setVisible(true);
			} else {
				statusbar.setVisible(false);
			}
		});

		viewMenu.add(sbarMi);

		menubar.add(fileMenu);
		menubar.add(viewMenu);

		setJMenuBar(menubar);
	}

	public static void main(String[] args) {

		EventQueue.invokeLater(() -> {
			JavaJCheckBoxMenuItem ex = new JavaJCheckBoxMenuItem();
			ex.setVisible(true);
		});
	}
}
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