以下源代码来自Sun Microsystems，显示与显示和单击JButton相关的各种事情，包括使用JButton类，ActionListener，ActionEvent，setMnemonic和actionPerformed 。

JButt、Accaction、ActListListar、ActEngEnter、StEnMeNeNIC、Java、Swing、JFrand、JPAND

/**
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided\"AS IS,\" without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. (\"SUN\")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */
// v 1.3
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
public class SwingApplication {
 private static String labelPrefix =\"Number of button clicks:\";
 private int numClicks = 0;
 public Component createComponents() {
 final JLabel label = new JLabel(labelPrefix +\"0\");
 JButton button = new JButton(\"I\'m a Swing button!\");
 button.setMnemonic(KeyEvent.VK_I);
 button.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 numClicks++;
 label.setText(labelPrefix + numClicks);
 }
 });
 label.setLabelFor(button);
 /**
 * An easy way to put space between a top-level container and its
 * contents is to put the contents in a JPanel that has an\"empty\"
 * border.
 */
 JPanel pane = new JPanel();
 pane.setBorder(BorderFactory.createEmptyBorder(30, //top
 30, //left
 10, //bottom
 30) //right
 );
 pane.setLayout(new GridLayout(0, 1));
 pane.add(button);
 pane.add(label);
 return pane;
 }
 public static void main(String[] args) {
 try {
 UIManager.setLookAndFeel(UIManager
 .getCrossPlatformLookAndFeelClassName());
 } catch (Exception e) {
 }
 //Create the top-level container and add contents to it.
 JFrame frame = new JFrame(\"SwingApplication\");
 SwingApplication app = new SwingApplication();
 Component contents = app.createComponents();
 frame.getContentPane().add(contents, BorderLayout.CENTER);
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.pack();
 frame.setVisible(true);
 }
}