Submenu : JMenu « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JMenu

import java.awt.event.KeyEvent;

import javax.swing.ButtonGroup;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;

public class Submenu  {

  public static void main(final String args[]) {
    JFrame frame = new JFrame("MenuSample Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JMenuBar menuBar = new JMenuBar();

    // File Menu, F - Mnemonic
    JMenu fileMenu = new JMenu("File");
    fileMenu.setMnemonic(KeyEvent.VK_F);
    menuBar.add(fileMenu);

    // File->New, N - Mnemonic
    JMenuItem newMenuItem = new JMenuItem("New", KeyEvent.VK_N);
    fileMenu.add(newMenuItem);

    // Edit->Options Submenu, O - Mnemonic, at.gif - Icon Image File
    JMenu findOptionsMenu = new JMenu("Options");
    Icon atIcon = new ImageIcon("at.gif");
    findOptionsMenu.setIcon(atIcon);
    findOptionsMenu.setMnemonic(KeyEvent.VK_O);
    fileMenu.add(findOptionsMenu);

    // ButtonGroup for radio buttons
    ButtonGroup directionGroup = new ButtonGroup();

    // Edit->Options->Forward, F - Mnemonic, in group
    JRadioButtonMenuItem forwardMenuItem = new JRadioButtonMenuItem("Forward", true);
    forwardMenuItem.setMnemonic(KeyEvent.VK_F);
    findOptionsMenu.add(forwardMenuItem);
    directionGroup.add(forwardMenuItem);

    // Edit->Options->Backward, B - Mnemonic, in group
    JRadioButtonMenuItem backwardMenuItem = new JRadioButtonMenuItem("Backward");
    backwardMenuItem.setMnemonic(KeyEvent.VK_B);
    findOptionsMenu.add(backwardMenuItem);
    directionGroup.add(backwardMenuItem);
    
    
    frame.setJMenuBar(menuBar);
    frame.setSize(350, 250);
    frame.setVisible(true);
  }
}

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