Java Swing LookAndFeel Demo

import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.UIManager.LookAndFeelInfo;
public class GridBagLayoutDemoPanel extends JPanel {
/**
*
*/
private static final long serialVersionUID = 566006540006934384L;
private JTextField mTxtFieldA;
private JTextField mTxtFieldB;
private JTextField mTxtFieldC;
private JButton mButtonA;
private JButton mButtonB;
private JButton mButtonC;
private JButton mButtonD;
private JButton mButtonE;
public GridBagLayoutDemoPanel() {
super(new GridBagLayout(), true);
initComponents();
setUpListeners();
}
private void initComponents() {
// text field
mTxtFieldA = new JTextField();
mTxtFieldB = new JTextField();
mTxtFieldC = new JTextField();
// Button
mButtonA = new JButton("Button A");
mButtonB = new JButton("Button B");
mButtonC = new JButton("Button C");
mButtonD = new JButton("Button D");
mButtonE = new JButton("Button E");
// align all the labels
GridBagConstraints c = new GridBagConstraints();
c.weightx = 0.5; // default is zero, all components will
c.fill = GridBagConstraints.HORIZONTAL;
c.anchor = GridBagConstraints.CENTER;
c.gridx = 0;
c.gridy = 0;
c.insets = new Insets(0, 0, 0, 0);
add(mButtonA, c);
c.gridx = 1;
c.gridy = 0;
add(mButtonB, c);
c.gridx = 2;
c.gridy = 0;
add(mButtonC, c);
c.gridx = 3;
c.gridy = 0;
add(mButtonD, c);
c.gridx = 4;
c.gridy = 0;
add(mButtonE, c);
// align the text field from right edge
GridBagConstraints txtCons = new GridBagConstraints();
txtCons.weightx = 0.5; // default is zero, all components will
txtCons.fill = GridBagConstraints.HORIZONTAL;
txtCons.anchor = GridBagConstraints.PAGE_END;
txtCons.weighty = 1.0; // request some extra vertical space, default
// zero
txtCons.gridx = 4;
txtCons.gridy = 1;
add(mTxtFieldA, txtCons);
txtCons.gridx = 3;
txtCons.gridy = 1;
add(mTxtFieldB, txtCons);
txtCons.gridx = 2;
txtCons.gridy = 1;
add(mTxtFieldC, txtCons);
// align the label
}
private void setUpListeners() {
}
public static void main(String[] args) {
// UIManager settings
/*
* javax.swing.plaf.metal.MetalLookAndFeel : Metal
* com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel : Nimbus
* com.sun.java.swing.plaf.motif.MotifLookAndFeel : CDE/Motif
* com.sun.java.swing.plaf.windows.WindowsLookAndFeel : Windows
* com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel : Windows Classic
*/
try {
LookAndFeelInfo[] mList = UIManager.getInstalledLookAndFeels();
for(LookAndFeelInfo info: mList) {
System.out.println(info.getClassName() + " : " + info.getName());
}
System.out.println("Java Default LookAndFeel is " + UIManager.getLookAndFeel().getName());
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (UnsupportedLookAndFeelException e) {
e.printStackTrace();
}

// Create and set up the window.
JFrame frame = new JFrame("GridBagLayout Demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new BorderLayout());

// custom icon iamge
GridBagLayoutDemoPanel gridPanel = new GridBagLayoutDemoPanel();
java.net.URL imageURL = gridPanel.getClass().getResource("gridbag.jpg");
try {
frame.setIconImage(ImageIO.read(imageURL));
} catch (IOException e) {
System.err.println("An error occured when loading the image icon...");
}
// Create and set up the content pane.
JPanel subPanel = new JPanel();
subPanel.setLayout(new BorderLayout());
subPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
subPanel.add(gridPanel, BorderLayout.CENTER);
frame.getContentPane().add(subPanel, BorderLayout.CENTER);
// Display the window.
frame.pack();
frame.setVisible(true);
}
}