Add Separator to JMenu : JMenu « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JMenu

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JSeparator;

public class MenuSeparator extends JFrame {
  public MenuSeparator() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JMenuBar bar = new JMenuBar();
    JMenu menu = new JMenu("File");
    bar.add(menu);

    menu.add(new JMenuItem("Close"));
    menu.add(new JSeparator()); // SEPARATOR
    menu.add(new JMenuItem("Exit"));

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

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

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

14.21.JMenu
	14.21.1.	The JMenu component is the basic menu item container that is placed on a JMenuBar
	14.21.2.	what menus look like
	14.21.3.	Adding a Menu to a Window
	14.21.4.	Add Separator to JMenu
	14.21.5.	Using Action Objects with Menus
	14.21.6.	Adding Menu Shortcuts
	14.21.7.	Set Mnemonic key
	14.21.8.	Submenu
	14.21.9.	Listening to JMenu Events with a ChangeListener: register a ChangeListener with a JMenu
	14.21.10.	Using MenuListener to listen to: menu canceled, selected and deselected events
	14.21.11.	Layout menu yourself
	14.21.12.	Customizing JMenu Look and Feel