?? mydemo3.java
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/* * 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 QandE;/* * MyDemo3.java requires no other files. */import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import java.awt.Font;import java.awt.BorderLayout; public class MyDemo3 { /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Create and set up the window. JFrame frame = new JFrame("MyDemo3"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Add a label with bold italic font. JLabel label = new JLabel("My Demo"); frame.getContentPane().add(BorderLayout.CENTER, label); if (true) { label.setFont(label.getFont().deriveFont(Font.ITALIC | Font.BOLD)); } else { //another way of doing it, but not as appropriate since //setFont is faster than using HTML. label.setText("<html><i>My Demo</i></html>"); } label.setHorizontalAlignment(JLabel.CENTER); JButton b = new JButton("A button"); frame.getContentPane().add(BorderLayout.PAGE_END, b); frame.getRootPane().setDefaultButton(b); //Display the window, making it a little bigger than it really needs to be. frame.pack(); frame.setSize(frame.getWidth() + 100, frame.getHeight() + 50); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); }}?? 快捷鍵說明
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