《Java2图形设计卷II：Swing》配套光盘源码

				import java.awt.*;
				import java.awt.event.*;
				import java.beans.*;
				import javax.swing.*;
				import javax.swing.event.*;
				
				public class Test extends JApplet {
					JDesktopPane desktopPane = new JDesktopPane();
				
					public void init() {
						Container contentPane = getContentPane();
				
						contentPane.add(desktopPane, BorderLayout.CENTER);
						desktopPane.setLayout(new FlowLayout());
				
						JInternalFrame jif = new JInternalFrame(
													"An Internal Frame", // title
								  					false, // resizable
								  					true,  // closable
													true,  // maximizable
													true); // iconifiable
				
						jif.setPreferredSize(new Dimension(300, 250));
						jif.addInternalFrameListener(new Listener(this));
				
						desktopPane.add(jif);
					}
				}
				class Listener implements InternalFrameListener { 
					private JApplet applet;
				
					public Listener(JApplet applet) {
						this.applet = applet;	
					}
					public void internalFrameActivated(InternalFrameEvent e) {
						applet.showStatus("frame activated");
					}
					public void internalFrameClosed(InternalFrameEvent e) {
						applet.showStatus("frame closed");
					}
					public void internalFrameClosing(InternalFrameEvent e) {
						applet.showStatus("frame closing");
					}
					public void internalFrameDeactivated(InternalFrameEvent e) {
						applet.showStatus("frame deactivated");
					}
					public void internalFrameDeiconified(InternalFrameEvent e) {
						applet.showStatus("frame deiconified");
					}
					public void internalFrameIconified(InternalFrameEvent e) {
						applet.showStatus("frame iconified");
					}
					public void internalFrameOpened(InternalFrameEvent e) {
						applet.showStatus("frame opened");
					}
					private void sleepForABit() {
						try {
							Thread.currentThread().sleep(5000);
						}
						catch(InterruptedException e) {
							e.printStackTrace();
						}
					}
				}