Source Code : GridBagLayout Pane

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GridBagLayout Pane

   
/*
 * 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.
 */

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

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);
  }
  public static void main(String[] a) {
    JFrame f = new JFrame();
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });

    f.setContentPane(new GridBagLayoutPane());
    f.pack();
    f.setVisible(true);
  }
}

           
         
    
    
  

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