/* * 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 layout;/* * GridBagLayoutDemo.java requires no other files. */import java.awt.*;import javax.swing.JButton;import javax.swing.JFrame;public class GridBagLayoutDemo {    final static boolean shouldFill = true;    final static boolean shouldWeightX = true;    final static boolean RIGHT_TO_LEFT = false;    public static void addComponentsToPane(Container pane) {        if (RIGHT_TO_LEFT) {            pane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);        }        JButton button;	pane.setLayout(new GridBagLayout());	GridBagConstraints c = new GridBagConstraints();	if (shouldFill) {	//natural height, maximum width	c.fill = GridBagConstraints.HORIZONTAL;	}	button = new JButton("Button 1");	if (shouldWeightX) {	c.weightx = 0.5;	}	c.fill = GridBagConstraints.HORIZONTAL;	c.gridx = 0;	c.gridy = 0;	pane.add(button, c);	button = new JButton("Button 2");	c.fill = GridBagConstraints.HORIZONTAL;	c.weightx = 0.5;	c.gridx = 1;	c.gridy = 0;	pane.add(button, c);	button = new JButton("Button 3");	c.fill = GridBagConstraints.HORIZONTAL;	c.weightx = 0.5;	c.gridx = 2;	c.gridy = 0;	pane.add(button, c);	button = new JButton("Long-Named Button 4");	c.fill = GridBagConstraints.HORIZONTAL;	c.ipady = 40;      //make this component tall	c.weightx = 0.0;	c.gridwidth = 3;	c.gridx = 0;	c.gridy = 1;	pane.add(button, c);	button = new JButton("5");	c.fill = GridBagConstraints.HORIZONTAL;	c.ipady = 0;       //reset to default	c.weighty = 1.0;   //request any extra vertical space	c.anchor = GridBagConstraints.PAGE_END; //bottom of space	c.insets = new Insets(10,0,0,0);  //top padding	c.gridx = 1;       //aligned with button 2	c.gridwidth = 2;   //2 columns wide	c.gridy = 2;       //third row	pane.add(button, c);    }    /**     * 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("GridBagLayoutDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Set up the content pane.        addComponentsToPane(frame.getContentPane());        //Display the window.        frame.pack();        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();            }        });    }}