《Java2图形设计卷II：Swing》配套光盘源码

				import javax.swing.*;
				import java.awt.*;
				import java.awt.event.*;
				
				public class Test extends JApplet {
					public void init() {
						Container contentPane = getContentPane();
				
						final JMenuBar mb = new JMenuBar();
						final MenuBarPrinter printer = new MenuBarPrinter();
				
						JMenu fileMenu = new JMenu("File");
						JMenu editMenu = new JMenu("Edit");
						JMenuItem exitItem = new JMenuItem("Exit");
				
						fileMenu.setMnemonic('F');
						editMenu.setMnemonic('F');
				
						fileMenu.add("New ...");
						fileMenu.add("Open ...");
						fileMenu.add("Save");
						fileMenu.add("Save As ..");
						fileMenu.addSeparator();
						fileMenu.add(exitItem);
				
						editMenu.add("Cut");
						editMenu.add("Copy");
						editMenu.add("Paste");
				
						mb.add(fileMenu);
						mb.add(editMenu);
						setJMenuBar(mb);
				
						JButton button = new JButton("show menu information");
						contentPane.setLayout(new FlowLayout());
						contentPane.add(button);
				
						button.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent e) {
								printer.print(mb);
							}
						});
				
						exitItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent e) {
								System.exit(0);
							}
						});
					}
				}
				class MenuBarPrinter {
				    static public void print(JMenuBar menubar) {
				        int  numMenus = menubar.getMenuCount();
				        JMenu nextMenu;
						
				        JMenuItem nextItem;
				
				        System.out.println();
				        System.out.println("MenuBar has "        +  
				                            menubar.getMenuCount() + 
				                            " menus");
				        System.out.println();
				
				        for(int i=0; i < numMenus; ++i) {
							nextMenu = menubar.getMenu(i);
							System.out.println(nextMenu.getText() + " menu ...");
							System.out.println(nextMenu);
				
							int numItems = nextMenu.getItemCount();
				
							for(int j=0; j < numItems; ++j) {
								nextItem = nextMenu.getItem(j);
								System.out.println(nextItem);
							}
							System.out.println();
						}
					}
				}