《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();
						JMenu fileMenu = new JMenu("File");
						JMenu editMenu = new JMenu("Edit");
						JMenuItem exitItem = new JMenuItem("Exit");
						JButton compButton = new JButton(
												"show menubar components ...");
						JButton menuButton = new JButton(
												"show menubar menus ...");
				
						fileMenu.add("New ...");
						fileMenu.add("Open ...");
						fileMenu.add("Save");
						fileMenu.add("Save As ..");
						fileMenu.addSeparator();
						fileMenu.add(exitItem);
				
						editMenu.add("Undo");
						editMenu.addSeparator();
						editMenu.add("Cut");
						editMenu.add("Copy");
						editMenu.add("Paste");
				
						mb.setMargin(new Insets(30,20,10,5));
						mb.add(new JLabel(new ImageIcon("smiley.gif")));
						mb.add(fileMenu);
						mb.add(editMenu);
				
						setJMenuBar(mb);
						contentPane.setLayout(new FlowLayout());
						contentPane.add(compButton);
						contentPane.add(menuButton);
				
						exitItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent e) {
								System.exit(0);
							}
						});
						menuButton.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent e) {
								Component c;
								int cnt = mb.getMenuCount();
				
								for(int i=0; i < cnt; ++i) {
									c = mb.getMenu(i);
									System.out.println(c);
									System.out.println();
								}
							}
						});
						compButton.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent e) {
								Component c;
								int cnt = mb.getComponentCount();
				
								for(int i=0; i < cnt; ++i) {
									c = mb.getComponentAtIndex(i);
									System.out.println(c);
									System.out.println();
								}
							}
						});
					}
				}