Java tutorial
/* * Copyright (c) 1995, 2008, Oracle and/or its affiliates. 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 Oracle or 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 lookandfeel; /* * LookAndFeelDemo.java is a Java SE 6 example that requires * one other file (TestTheme.java). */ import javax.swing.*; import java.awt.*; import java.awt.event.*; import javax.swing.plaf.metal.*; public class LookAndFeelDemo implements ActionListener { private static String labelPrefix = "Number of button clicks: "; private int numClicks = 0; final JLabel label = new JLabel(labelPrefix + "0 "); // Specify the look and feel to use by defining the LOOKANDFEEL constant // Valid values are: null (use the default), "Metal", "System", "Motif", // and "GTK" final static String LOOKANDFEEL = "Metal"; // If you choose the Metal L&F, you can also choose a theme. // Specify the theme to use by defining the THEME constant // Valid values are: "DefaultMetal", "Ocean", and "Test" final static String THEME = "Test"; public Component createComponents() { JButton button = new JButton("I'm a Swing button!"); button.setMnemonic(KeyEvent.VK_I); button.addActionListener(this); 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(new GridLayout(0, 1)); pane.add(button); pane.add(label); pane.setBorder(BorderFactory.createEmptyBorder(30, //top 30, //left 10, //bottom 30) //right ); return pane; } public void actionPerformed(ActionEvent e) { numClicks++; label.setText(labelPrefix + numClicks); } private static void initLookAndFeel() { String lookAndFeel = null; if (LOOKANDFEEL != null) { if (LOOKANDFEEL.equals("Metal")) { lookAndFeel = UIManager.getCrossPlatformLookAndFeelClassName(); // an alternative way to set the Metal L&F is to replace the // previous line with: // lookAndFeel = "javax.swing.plaf.metal.MetalLookAndFeel"; } else if (LOOKANDFEEL.equals("System")) { lookAndFeel = UIManager.getSystemLookAndFeelClassName(); } else if (LOOKANDFEEL.equals("Motif")) { lookAndFeel = "com.sun.java.swing.plaf.motif.MotifLookAndFeel"; } else if (LOOKANDFEEL.equals("GTK")) { lookAndFeel = "com.sun.java.swing.plaf.gtk.GTKLookAndFeel"; } else { System.err.println("Unexpected value of LOOKANDFEEL specified: " + LOOKANDFEEL); lookAndFeel = UIManager.getCrossPlatformLookAndFeelClassName(); } try { UIManager.setLookAndFeel(lookAndFeel); // If L&F = "Metal", set the theme if (LOOKANDFEEL.equals("Metal")) { if (THEME.equals("DefaultMetal")) MetalLookAndFeel.setCurrentTheme(new DefaultMetalTheme()); else if (THEME.equals("Ocean")) MetalLookAndFeel.setCurrentTheme(new OceanTheme()); else MetalLookAndFeel.setCurrentTheme(new TestTheme()); UIManager.setLookAndFeel(new MetalLookAndFeel()); } } catch (ClassNotFoundException e) { System.err.println("Couldn't find class for specified look and feel:" + lookAndFeel); System.err.println("Did you include the L&F library in the class path?"); System.err.println("Using the default look and feel."); } catch (UnsupportedLookAndFeelException e) { System.err.println("Can't use the specified look and feel (" + lookAndFeel + ") on this platform."); System.err.println("Using the default look and feel."); } catch (Exception e) { System.err.println("Couldn't get specified look and feel (" + lookAndFeel + "), for some reason."); System.err.println("Using the default look and feel."); e.printStackTrace(); } } } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event dispatch thread. */ private static void createAndShowGUI() { //Set the look and feel. initLookAndFeel(); //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); //Create and set up the window. JFrame frame = new JFrame("SwingApplication"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); LookAndFeelDemo app = new LookAndFeelDemo(); Component contents = app.createComponents(); frame.getContentPane().add(contents, BorderLayout.CENTER); //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(); } }); } }