JFrame

Hi,

I created a JFrame with a JButton.If i pressed the JButton
I am calling a JInternalFrame .
Here My problem is once the JInternalFrame comes ,the
JButton in the JFrame is not visible.
Is there any method to avoid this.How will solve this problem.

Here is My code.

JFrame With Button
-------------------------------
import java.awt.*;
import java.awt.event.*;
import com.sun.java.swing.*;
public class Jmain extends JFrame implements ActionListener
{
      JLabel l1,l2,l3,l4;
      JTextField tf1,tf2;
      JPasswordField pf;
      JButton b1,b2;
      JDesktopPane desktop;
      Rectangle r1,r2,r3,r4,r5,r6,r7,r8,r9,r10;
      //passcheck pc;
      //error ee;
      //boolean bool1,bool2;
      public Jmain()
      {
            int inset = 50;
      Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
            setBounds(inset, inset,
              screenSize.width - inset*2,
              screenSize.height-inset*2);
            /*l1=new JLabel("CheckIT");
            l2=new JLabel("AdminiName");
            l3=new JLabel("AdminiID");
            l4=new JLabel("Password");
            tf1=new JTextField(25);
            tf2=new JTextField(25);
            pf=new JPasswordField(25);
            pf.setEchoChar('*');*/
            b1=new JButton("UserDetail");
            b1.addActionListener(this);
            b1.setBounds(30,235,150,30);
            getContentPane().add(b1);
            l2=new JLabel("AdminiName");
            l2.setBounds(100,100,20,30);
            getContentPane().add(l2);
            l2.setVisible(false);
            /*b2=new JButton("QuestionBank");
            b1.addActionListener(this);
            //b2.addActionListener(this);
            getContentPane().add(l1);
            getContentPane().add(l2);
            getContentPane().add(tf1);
            getContentPane().add(l3);
            getContentPane().add(tf2);
            getContentPane().add(l4);
            getContentPane().add(pf);
            getContentPane().add(b1);
            getContentPane().add(b2);
            tf1.setSelectionColor(Color.blue);*/
            setVisible(true);
            addWindowListener(new winHandle());
      
      }
      class winHandle extends WindowAdapter
      {
            public void windowClosing(WindowEvent e)
            {
                  System.exit(0);
            }
      }
      public void actionPerformed(ActionEvent e)
      {
            String s=e.getActionCommand();
            if(s.equals("UserDetail"))
            {
                  System.out.println("Before");
                  
            desktop = new JDesktopPane();
            JUserDetail in=new JUserDetail();
            desktop.add(in);
            try{
                  in.setSelected(true);
            }catch(Exception ee){}
            setContentPane(desktop);
            setVisible(true);
            System.out.println("After");
            
            }
            if(s.equals("QuestionBank"))
            {
                  System.out.println("QuestionBank");
            }
      }
      /*public void paint(Graphics p)
      {
            
            Font f1=new Font("TimesRoman",Font.BOLD+Font.ITALIC,25);
            Font f2=new Font("TimesRoman",Font.BOLD,15);
            l1.setFont(f1);
            r1=new Rectangle(150,50,100,30);
            l1.setBounds(r1);
            r2=new Rectangle(80,100,100,30);
            l2.setBounds(r2);
            l2.setFont(f2);
            r3=new Rectangle(220,103,100,24);
            tf1.setBounds(r3);
            r4=new Rectangle(80,140,100,30);
            l3.setBounds(r4);
            l3.setFont(f2);
            r5=new Rectangle(220,143,100,24);
            tf2.setBounds(r5);
            r6=new Rectangle(80,180,100,30);
            l4.setBounds(r6);
            l4.setFont(f2);
            r7=new Rectangle(220,183,100,24);
            pf.setBounds(r7);
            r8=new Rectangle(30,235,150,30);
            b1.setBounds(r8);
            r9=new Rectangle(210,234,150,30);
            b2.setBounds(r9);
            
      }*/
            public static void main(String arg[])
            {
                  Jmain j=new Jmain();
                  j.show();
            }
      }

Here only one JButton  Userdetail is  visible.If i click that JButton it will call another JInternalFrame.

JInternalFrame
----------------------
import com.sun.java.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JUserDetail extends JInternalFrame implements ActionListener
{
      JLabel l1,l2,l3,l4,l5,l6;
      JTextField tf1,tf2,tf3,tf4;
      JTextArea ta;
      JCheckBox cb;
      JButton b1,b2,b3,b4,b5,b6;
      JScrollPane jp;
      Rectangle r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,r13,r14,r15,r16,r17,r18;
      public JUserDetail()
      {
            super("UserSecurityDetail",true,true,true,true);
            Font f=new Font("TimesRoman",Font.BOLD+Font.ITALIC,15);
            l1=new JLabel("User Name");
            l1.setFont(f);
            l1.setBounds(50,10,100,30);
            getContentPane().add(l1);
            tf1=new JTextField();
            tf1.setBounds(150,12,120,28);
            getContentPane().add(tf1);
            l2=new JLabel("User No");
            l2.setBounds(50,60,100,30);
            l2.setFont(f);
            getContentPane().add(l2);
            tf2=new JTextField();
            tf2.setBounds(150,62,120,28);
            getContentPane().add(tf2);
            l3=new JLabel("Password");
            l3.setBounds(50,110,100,30);
            l3.setFont(f);      
            getContentPane().add(l3);
            tf3=new JTextField();
            tf3.setBounds(150,112,120,28);
            getContentPane().add(tf3);
            l4=new JLabel("User Level");
            l4.setBounds(50,160,100,30);
            l4.setFont(f);      
            getContentPane().add(l4);
            tf4=new JTextField();
            tf4.setBounds(150,162,120,28);
            getContentPane().add(tf4);
            l5=new JLabel("Active");
            l5.setBounds(50,210,100,30);
            l5.setFont(f);      
            getContentPane().add(l5);
            cb=new JCheckBox();
            cb.setBounds(150,212,30,30);
            getContentPane().add(cb);
            l6=new JLabel("User Details/Remarks");
            l6.setBounds(325,20,200,30);
            l6.setFont(f);
            getContentPane().add(l6);
            ta=new JTextArea();
            jp=new JScrollPane(ta);
            jp.setBounds(300,50,250,75);
            getContentPane().add(jp);
            b1=new JButton("ADD");
            b1.setBounds(5,300,100,30);
            getContentPane().add(b1);
            b2=new JButton("EDIT");
            b2.setBounds(105,300,100,30);
            getContentPane().add(b2);
            b3=new JButton("DELETE");
            b3.setBounds(205,300,100,30);
            getContentPane().add(b3);
            b4=new JButton("SAVE");
            b4.setBounds(305,300,100,30);
            getContentPane().add(b4);
            b5=new JButton("EXIT");
            b5.setBounds(405,300,100,30);
            getContentPane().add(b5);
            b5.addActionListener(this);
            b6=new JButton("RESET");
            b6.setBounds(505,300,100,30);
            getContentPane().add(b6);
            JButton b7=new JButton("Junk");
            b7.setBounds(550,300,10,10);
            getContentPane().add(b7);
            b7.setVisible(false);
            setSize(615,400);
            setLocation(250,10);
                        
      }
            public void actionPerformed(ActionEvent e)
            {
                  setVisible(false);
                  dispose();
            }
      
      
}
if i press the JButton this JInternalFrame is coming but the JButton is not visible.