Problem with JInternalFrame

[hameem]

im suppose to show an Internal Frame when the button is pressed...but nothing is showing except the dialogue box i've put. Here's the code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;

public class Search extends JFrame {
JLabel label1;
JTextField text1;
JButton button1;
JPanel buttonPanel;
JDesktopPane desktop = new JDesktopPane();

public Search(){
super("Search On Employee");
Container container=getContentPane();
container.add(desktop);
container.setLayout(null);

//buttonPanel = new JPanel();
//buttonPanel.setLayout( new GridLayout( 5,7 ) );

label1=new JLabel("Employee ID: ");
container.add(label1);

text1=new JTextField(15);
container.add(text1);

button1=new JButton("Search");
//buttonPanel.add( button1 );
//container.add( buttonPanel, BorderLayout.SOUTH );
container.add(button1);

Insets insets = container.getInsets();

Dimension size = label1.getPreferredSize();
label1.setBounds(10 + insets.left, 20 + insets.top, size.width, size.height);
size = text1.getPreferredSize();
text1.setBounds(100 + insets.left, 19 + insets.top, size.width, size.height);
size = button1.getPreferredSize();
button1.setBounds(177 + insets.left, 90 + insets.top, size.width+15 , size.height+15);

setSize( 340,250);
setVisible( true );

ButtonHandelar handler = new ButtonHandelar();
button1.addActionListener( handler );}//Search

public void showInternal(){

JInternalFrame frame=new JInternalFrame("Internal",true,true,true,true);
frame.setSize(320,240);
desktop.add(frame);
frame.setVisible(true);

System.out.println("in the internal...");
}

public static void main(String a[]){
Search application = new Search();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); }//main

private class ButtonHandelar implements ActionListener {

// process Button events
public void actionPerformed( ActionEvent event )
{
String string = "";
if ( event.getSource() == button1 )
{
string = "EMPID: " + text1.getText() ;


JOptionPane.showMessageDialog( null, string );
showInternal();
}
else
System.exit(0);


}//button handler

}//jframe
}

[Fubarable]

I recommend that you avoid using the "null" layout like the plague and that you read up on how to use layout managers.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Fubar extends JFrame
{
  JLabel label1;
  JTextField text1;
  JButton button1;
  JPanel buttonPanel;
  JDesktopPane desktop = new JDesktopPane();

  public Fubar()
  {
    super("Search On Employee");
    Container container = getContentPane();
    container.add(new JScrollPane(desktop));
    JPanel topPanel = new JPanel();
    label1 = new JLabel("Employee ID: ");
    topPanel.add(label1);

    text1 = new JTextField(15);
    topPanel.add(text1);

    button1 = new JButton("Search");
    topPanel.add(button1);

    container.add(topPanel, BorderLayout.NORTH);

    container.setPreferredSize(new Dimension(340, 250));
    setVisible(true);

    ButtonHandelar handler = new ButtonHandelar();
    button1.addActionListener(handler);
  }// Search

  public void showInternal()
  {

    JInternalFrame frame = new JInternalFrame("Internal", true, true, true,
      true);
    frame.setBounds(0, 0, 320, 240);
    desktop.add(frame);
    frame.setVisible(true);

    System.out.println("in the internal...");
  }

  public static void main(String a[])
  {
    Fubar application = new Fubar();
    application.pack();
    application.setLocationRelativeTo(null);

    application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    application.setVisible(true);
  }// main

  private class ButtonHandelar implements ActionListener
  {

    // process Button events
    public void actionPerformed(ActionEvent event)
    {
      String string = "";
      if (event.getSource() == button1)
      {
        string = "EMPID: " + text1.getText();

        JOptionPane.showMessageDialog(null, string);
        showInternal();
      }
      else
        System.exit(0);

    }//button handler

  }//jframe
}