Swing Components Java


            import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestFocus extends JFrame
 { 
 JButton button; public TestFocus() 
 { 
 JPanel panel = new JPanel(); 
 setContentPane( panel ); 
 panel.add( new JTextField( "Focus is on Click Me button", 20 ) ); 
 button = new JButton( "Click Me" ); 
 button.addActionListener( new ActionListener() 
 { 
 public void actionPerformed(ActionEvent e) 
 { 
 JDialog dialog = new JDialog1(); 
 } 
 }); 
 panel.add( button ); 
 // Listen for windowOpened event to set focus 
 addWindowListener( new WindowAdapter() 
 { 
 public void windowOpened( WindowEvent e ) 
 { 
 button.requestFocus(); 
 } 
 }); 
 } 
 public static void main(String[] args) 
 { 
 TestFocus frame = new TestFocus(); 
 frame.setDefaultCloseOperation( EXIT_ON_CLOSE ); 
 frame.pack(); 
 frame.setVisible(true);
 // frame.button.requestFocus(); 
 } 
 class JDialog1 extends JDialog 
 { 
 public JDialog1() 
 { 
 JPanel panel = new JPanel(); 
 setContentPane( panel); 
 panel.add( new JTextField( "Focus is on next Text Field", 20) ); 
 final JTextField tf1 = new JTextField(9); 
 panel.add( tf1 ); 
 pack(); 
 // Use invokeLater AFTER the dialog is shown 
 setVisible( true ); 
 SwingUtilities.invokeLater( new Runnable() 
 { 
 public void run() 
 { 
 tf1.requestFocus(); 
 } 
 }); 
 } 
 }
}