/* * Copyright (c) 2000 David Flanagan.  All rights reserved. * This code is from the book Java Examples in a Nutshell, 2nd Edition. * It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied. * You may study, use, and modify it for any non-commercial purpose. * You may distribute it non-commercially as long as you retain this notice. * For a commercial use license, or to purchase the book (recommended), * visit http://www.davidflanagan.com/javaexamples2. */package com.davidflanagan.examples.gui;import java.awt.*;import javax.swing.*;public class GridBagLayoutPane extends JPanel {    public GridBagLayoutPane() {	// Create and specify a layout manager	this.setLayout(new GridBagLayout());		// Create a constraints object, and specify some default values	GridBagConstraints c = new GridBagConstraints();	c.fill = GridBagConstraints.BOTH; // components grow in both dimensions	c.insets = new Insets(5,5,5,5);   // 5-pixel margins on all sides		// Create and add a bunch of buttons, specifying different grid	// position, and size for each.	// Give the first button a resize weight of 1.0 and all others	// a weight of 0.0.  The first button will get all extra space.	c.gridx = 0; c.gridy = 0; c.gridwidth = 4; c.gridheight=4;	c.weightx = c.weighty = 1.0;	this.add(new JButton("Button #1"), c);		c.gridx = 4; c.gridy = 0; c.gridwidth = 1; c.gridheight=1;	c.weightx = c.weighty = 0.0;	this.add(new JButton("Button #2"), c);		c.gridx = 4; c.gridy = 1; c.gridwidth = 1; c.gridheight=1;	this.add(new JButton("Button #3"), c);		c.gridx = 4; c.gridy = 2; c.gridwidth = 1; c.gridheight=2;	this.add(new JButton("Button #4"), c);		c.gridx = 0; c.gridy = 4; c.gridwidth = 1; c.gridheight=1;	this.add(new JButton("Button #5"), c);		c.gridx = 2; c.gridy = 4; c.gridwidth = 1; c.gridheight=1;	this.add(new JButton("Button #6"), c);		c.gridx = 3; c.gridy = 4; c.gridwidth = 2; c.gridheight=1;	this.add(new JButton("Button #7"), c);		c.gridx = 1; c.gridy = 5; c.gridwidth = 1; c.gridheight=1;	this.add(new JButton("Button #8"), c);		c.gridx = 3; c.gridy = 5; c.gridwidth = 1; c.gridheight=1;	this.add(new JButton("Button #9"), c);    }}