Adding Drop-Down Menus : JMenuItem « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JMenuItem

import javax.swing.ButtonGroup;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;
public class AddingDropDownMenus extends JFrame {
  private JMenuBar menuBar = new JMenuBar(); // Window menu bar
  private JMenuItem newItem, openItem, closeItem, saveItem, saveAsItem, printItem;
  private JRadioButtonMenuItem lineItem, rectangleItem, circleItem;
  private JCheckBoxMenuItem redItem, yellowItem;
  public AddingDropDownMenus() {
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setJMenuBar(menuBar);
    JMenu fileMenu = new JMenu("File");
    JMenu elementMenu = new JMenu("Elements");
    newItem = fileMenu.add("New");
    openItem = fileMenu.add("Open");
    closeItem = fileMenu.add("Close");
    fileMenu.addSeparator();
    saveItem = fileMenu.add("Save");
    saveAsItem = fileMenu.add("Save As...");
    fileMenu.addSeparator();
    printItem = fileMenu.add("Print");
    elementMenu.add(lineItem = new JRadioButtonMenuItem("Line", true));
    elementMenu.add(rectangleItem = new JRadioButtonMenuItem("Rectangle", false));
    elementMenu.add(circleItem = new JRadioButtonMenuItem("Circle", false));
    ButtonGroup types = new ButtonGroup();
    types.add(lineItem);
    types.add(rectangleItem);
    types.add(circleItem);
    elementMenu.addSeparator();
    elementMenu.add(redItem = new JCheckBoxMenuItem("Red", false));
    elementMenu.add(yellowItem = new JCheckBoxMenuItem("Yellow", false));
    menuBar.add(fileMenu); 
    menuBar.add(elementMenu);
  }
  public static void main(String[] a) {
    AddingDropDownMenus window = new AddingDropDownMenus(); 
    window.setBounds(30, 30, 300, 300); // Size
    window.setVisible(true);
  }
}

14.23.JMenuItem
	14.23.1.	Creating JMenuItem Components
	14.23.2.	Creating Menuitem from Action class
	14.23.3.	Adding Drop-Down Menus
	14.23.4.	Disable Menuitem
	14.23.5.	Adding Mnemonic and Accelerator to Menuitem
	14.23.6.	Using Function key as Accelerator
	14.23.7.	Listening to JMenuItem Events with an ActionListener
	14.23.8.	Listening to JMenuItem Events with a MenuDragMouseListener
	14.23.9.	Listening to JMenuItem Events with a MenuKeyListener
	14.23.10.	Separating Menu Items in a Menu
	14.23.11.	Creating an About Menu Item
	14.23.12.	Creating a Menu Item That Listens for Changes to Its Selection Status
	14.23.13.	Customizing JMenuItem Look and Feel