Swing Components Java

package com.ack.gui.swing.simple;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.*;
public class UsingLayoutManagers extends JFrame {
public UsingLayoutManagers() {
super( "Common Layout Managers" );
setSize( 500, 380 );
JDesktopPane desktop = new JDesktopPane();
getContentPane().add( desktop );
JInternalFrame fr1 = new JInternalFrame( "FlowLayout", true, true );
fr1.setBounds( 10, 10, 150, 150 );
Container c = fr1.getContentPane();
c.setLayout( new FlowLayout() );
c.add( new JButton( "1" ) );
c.add( new JButton( "2" ) );
c.add( new JButton( "3" ) );
c.add( new JButton( "4" ) );
desktop.add( fr1, 0 );
JInternalFrame fr2 = new JInternalFrame( "GridLayout", true, true );
fr2.setBounds( 170, 10, 150, 150 );
c = fr2.getContentPane();
c.setLayout( new GridLayout( 2, 2 ) );
c.add( new JButton( "1" ) );
c.add( new JButton( "2" ) );
c.add( new JButton( "3" ) );
c.add( new JButton( "4" ) );
desktop.add( fr2, 0 );
JInternalFrame fr3 = new JInternalFrame( "BorderLayout", true, true );
fr3.setBounds( 330, 10, 150, 150 );
c = fr3.getContentPane();
c.add( new JButton( "1" ), BorderLayout.NORTH );
c.add( new JButton( "2" ), BorderLayout.EAST );
c.add( new JButton( "3" ), BorderLayout.SOUTH );
c.add( new JButton( "4" ), BorderLayout.WEST );
desktop.add( fr3, 0 );
JInternalFrame fr4 = new JInternalFrame( "BoxLayout - X", true, true );
fr4.setBounds( 10, 170, 250, 120 );
c = fr4.getContentPane();
c.setLayout( new BoxLayout( c, BoxLayout.X_AXIS ) );
c.add( new JButton( "1" ) );
c.add( Box.createHorizontalStrut( 12 ) );
c.add( new JButton( "2" ) );
c.add( Box.createGlue() );
c.add( new JButton( "3" ) );
c.add( Box.createHorizontalGlue() );
c.add( new JButton( "4" ) );
desktop.add( fr4, 0 );
JInternalFrame fr5 = new JInternalFrame( "BoxLayout - Y", true, true );
fr5.setBounds( 330, 170, 150, 180 );
c = fr5.getContentPane();
c.setLayout( new BoxLayout( c, BoxLayout.Y_AXIS ) );
c.add( new JButton( "1" ) );
c.add( Box.createVerticalStrut( 10 ) );
c.add( new JButton( "2" ) );
c.add( Box.createGlue() );
c.add( new JButton( "3" ) );
c.add( Box.createVerticalGlue() );
c.add( new JButton( "4" ) );
desktop.add( fr5, 0 );
try {
fr1.setSelected( true );
}
catch( java.beans.PropertyVetoException ex ) {
}
WindowListener wndCloser = new WindowAdapter() {
public void windowClosing( WindowEvent e ) {
System.exit( 0 );
}
};
addWindowListener( wndCloser );
fr1.show();
fr2.show();
fr3.show();
fr4.show();
fr5.show();
setVisible( true );
}
public static void main( String argv[] ) {
new UsingLayoutManagers();
}
}