📄 buttonhtmldemo.java

📁 java tutorial.sun公司官方出品。java入门书籍。最新版
💻 JAVA
字号:
/* * Copyright (c) 1995 - 2008 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: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions 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 nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package components;import java.awt.*;import java.awt.event.*;import javax.swing.AbstractButton;import javax.swing.JButton;import javax.swing.JPanel;import javax.swing.JFrame;import javax.swing.ImageIcon;/*  * ButtonHtmlDemo.java uses the following files: *   images/right.gif *   images/middle.gif *   images/left.gif */public class ButtonHtmlDemo extends JPanel                            implements ActionListener {    protected JButton b1, b2, b3;    public ButtonHtmlDemo() {        ImageIcon leftButtonIcon = createImageIcon("images/right.gif");        ImageIcon middleButtonIcon = createImageIcon("images/middle.gif");        ImageIcon rightButtonIcon = createImageIcon("images/left.gif");                b1 = new JButton("<html><center><b><u>D</u>isable</b><br>"                         + "<font color=#ffffdd>middle button</font>",                          leftButtonIcon);        Font font = b1.getFont().deriveFont(Font.PLAIN);        b1.setFont(font);        b1.setVerticalTextPosition(AbstractButton.CENTER);        b1.setHorizontalTextPosition(AbstractButton.LEADING); //aka LEFT, for left-to-right locales        b1.setMnemonic(KeyEvent.VK_D);        b1.setActionCommand("disable");        b2 = new JButton("middle button", middleButtonIcon);        b2.setFont(font);        b2.setForeground(new Color(0xffffdd));        b2.setVerticalTextPosition(AbstractButton.BOTTOM);        b2.setHorizontalTextPosition(AbstractButton.CENTER);        b2.setMnemonic(KeyEvent.VK_M);        b3 = new JButton("<html><center><b><u>E</u>nable</b><br>"                         + "<font color=#ffffdd>middle button</font>",                          rightButtonIcon);        b3.setFont(font);        //Use the default text position of CENTER, TRAILING (RIGHT).        b3.setMnemonic(KeyEvent.VK_E);        b3.setActionCommand("enable");        b3.setEnabled(false);        //Listen for actions on buttons 1 and 3.        b1.addActionListener(this);        b3.addActionListener(this);        b1.setToolTipText("Click this button to disable the middle button.");        b2.setToolTipText("This middle button does nothing when you click it.");        b3.setToolTipText("Click this button to enable the middle button.");        //Add Components to this container, using the default FlowLayout.        add(b1);        add(b2);        add(b3);    }    public void actionPerformed(ActionEvent e) {        if ("disable".equals(e.getActionCommand())) {            b2.setEnabled(false);            b1.setEnabled(false);            b3.setEnabled(true);        } else {            b2.setEnabled(true);            b1.setEnabled(true);            b3.setEnabled(false);        }    }    /** Returns an ImageIcon, or null if the path was invalid. */    protected static ImageIcon createImageIcon(String path) {        java.net.URL imgURL = ButtonHtmlDemo.class.getResource(path);        if (imgURL != null) {            return new ImageIcon(imgURL);        } else {            System.err.println("Couldn't find file: " + path);            return null;        }    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event dispatch thread.     */    private static void createAndShowGUI() {        //Create and set up the window.        JFrame frame = new JFrame("ButtonHtmlDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Add content to the window.        frame.add(new ButtonHtmlDemo());        //Display the window.        frame.pack();        frame.setVisible(true);    }    public static void main(String[] args) {        //Schedule a job for the event dispatch thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }}
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -