《Java2图形设计卷II：Swing》配套光盘源码

				import java.awt.*;
				import java.awt.event.*;
				import javax.swing.*;
				
				public class Test extends JApplet {
					public void init() {
						Container contentPane = getContentPane();
						CustomAction action = new CustomAction();
						CustomButton button = new CustomButton(action);
				
						contentPane.setLayout(new FlowLayout());
						contentPane.add(button);
					}
				}
				class CustomButton extends JButton {
					public CustomButton(Action action) {
						super((String)action.getValue(Action.NAME),
							  (Icon)action.getValue(Action.SMALL_ICON));
				
						String shortDescription = (String)action.getValue(
													Action.SHORT_DESCRIPTION);
				
						setToolTipText(shortDescription);
						addActionListener(action);
					}
				}
				class CustomAction extends AbstractAction {
					public CustomAction() {
						super("doit", new ImageIcon("skelly.gif"));
						putValue(Action.SHORT_DESCRIPTION, "a short description");
					}
					public void actionPerformed(ActionEvent e) {
						System.out.println("Custom action performed");
					}
				}