/* * 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 misc;import java.awt.*;import java.awt.event.*;import javax.swing.*;/* * FocusConceptsDemo.java requires no other files. */public class FocusConceptsDemo extends JPanel {    static JFrame frame;    JTextField t1, t2, t3, t4;    JButton b1, b2, b3, b4;    JTextArea text1;    public FocusConceptsDemo() {        super(new BorderLayout());        b1 = new JButton("JButton");        b2 = new JButton("JButton");        b3 = new JButton("JButton");        b4 = new JButton("JButton");        JPanel buttonPanel = new JPanel(new GridLayout(1,1));        buttonPanel.add(b1);        buttonPanel.add(b2);        buttonPanel.add(b3);        buttonPanel.add(b4);        text1 = new JTextArea("JTextArea", 15, 40);        JPanel textAreaPanel = new JPanel(new BorderLayout());        textAreaPanel.add(text1, BorderLayout.CENTER);        t1 = new JTextField("JTextField");        t2 = new JTextField("JTextField");        t3 = new JTextField("JTextField");        t4 = new JTextField("JTextField");        JPanel textFieldPanel = new JPanel(new GridLayout(1,1));        textFieldPanel.add(t1);        textFieldPanel.add(t2);        textFieldPanel.add(t3);        textFieldPanel.add(t4);        add(buttonPanel, BorderLayout.PAGE_START);        add(textAreaPanel, BorderLayout.CENTER);        add(textFieldPanel, BorderLayout.PAGE_END);        setBorder(BorderFactory.createEmptyBorder(20,20,20,20));    }    public static void main(String[] args) {		/* Use an appropriate Look and Feel */        try {            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");            UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");        } catch (UnsupportedLookAndFeelException ex) {            ex.printStackTrace();        } catch (IllegalAccessException ex) {            ex.printStackTrace();        } catch (InstantiationException ex) {            ex.printStackTrace();        } catch (ClassNotFoundException ex) {            ex.printStackTrace();        }        /* Turn off metal's use of bold fonts */        UIManager.put("swing.boldMetal", Boolean.FALSE);		        //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();            }        });    }        /**     * 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.        frame = new JFrame("FocusConceptsDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        JComponent newContentPane = new FocusConceptsDemo();        newContentPane.setOpaque(true); //content panes must be opaque        frame.setContentPane(newContentPane);        //Display the window.        frame.pack();        frame.setVisible(true);    }    }