《Java2图形设计卷II：Swing》配套光盘源码

				import javax.swing.*;
				import javax.swing.event.*;
				import java.awt.*;
				import java.awt.event.*;
				
				public class Test extends JApplet {
					public void init() {
						JMenuBar mb = new JMenuBar();
						JMenu fileMenu = new JMenu("File");
						JMenuItem newItem = new JMenuItem("New ..."),
									openItem = new JMenuItem("Open ..."),
									saveItem = new JMenuItem("Save"),
									saveAsItem = new JMenuItem("Save As ..."),
									exitItem = new JMenuItem("Exit");
						Listener listener = new Listener(this);
				
						fileMenu.add(newItem);
						fileMenu.add(openItem);
						fileMenu.add(saveItem);
						fileMenu.add(saveAsItem);
						fileMenu.addSeparator();
						fileMenu.add(exitItem);
				
						newItem.setActionCommand("Create a New Document");
						openItem.setActionCommand("Open an Existing Document");
						saveItem.setActionCommand("Save Document");
						saveAsItem.setActionCommand("Save Document As ...");
						exitItem.setActionCommand("Exit the applet");
				
						newItem.addChangeListener(listener);
						openItem.addChangeListener(listener);
						saveItem.addChangeListener(listener);
						saveAsItem.addChangeListener(listener);
						exitItem.addChangeListener(listener);
				
						mb.add(fileMenu);
						setJMenuBar(mb);
				
						exitItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent e) {
								System.exit(0);
							}
						});
					}
				}
				class Listener implements ChangeListener {
					private JApplet applet;
				
					public Listener(JApplet applet) {
						this.applet = applet;
					}
					public void stateChanged(ChangeEvent e) {
						JMenuItem b = (JMenuItem)e.getSource();
				
						if(b.isArmed())
							applet.showStatus(b.getActionCommand());
					}
				}