How do I make the controls on JPanel instantiated from other class visible?

I am using Netbeans GUI editor to create a GUI. It's really terrific....but... I have aJFrame form containing a JPanel. I also have a "panel" class that extends JPanel. I would like to insantiate an object of teh "panel" class and use it as the JPanel in the JFrame. Sounds simple enough.
When I do this, I see the JPanel from my "panel" class gets instantiated and used in the JFrame (yay), but the button and text label do not show up.
The JFrame is in the class/file NewJFrame.java and the JPanel is in the class/file TestJPanel.java. I'm really about to pull my hair out. ;-) Any help would be greatly appreciated...I'm sure it must be something simple I have forgotten to do.
Here is code for NewJFrame.java
package my.gui;
public class NewJFrame extends javax.swing.JFrame {
public NewJFrame() {
initComponents();
@SuppressWarnings("unchecked")
private void initComponents() {
jPanel1 = new my.gui.TestJPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.revalidate();
org.jdesktop.layout.GroupLayout jPanel1Layout = new org.jdesktop.layout.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 400, Short.MAX_VALUE)
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 300, Short.MAX_VALUE)
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
pack();
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
private javax.swing.JPanel jPanel1;
And the code for TestJPanel.java
package my.gui;
import java.awt.Color;
public class TestJPanel extends javax.swing.JPanel {
public TestJPanel() {
initComponents();
this.setBackground(Color.white);
@SuppressWarnings("unchecked")
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jLabel1.setText("jLabel1");
jButton1.setText("jButton1");
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(jLabel1)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
.add(jButton1)
.addContainerGap(273, Short.MAX_VALUE))
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(103, 103, 103)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jLabel1)
.add(jButton1))
.addContainerGap(174, Short.MAX_VALUE))
public javax.swing.JButton jButton1;
public javax.swing.JLabel jLabel1;
}

If you really want to learn Swing, I advise you to put the NetBeans away, and dive into the Sun Swing tutorials where you'll learn to code your Swing by hand. One of the main things that you'll learn -- and likely the thing that is tripping your current code up -- is how to use layout managers in a way that will allow you to flexibly place JPanels and other components where you want them, where they'll resize if need be, and where they'll be visible when you want them to be.
Much luck.

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--{code}
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame extends JFrame implements ActionListener
     private JButton Three;
     private JButton Four;
     private JButton One;
     private JButton Two;
     static int num = 0;
public Frame()
     JPanel p1 = new JPanel();
getContentPane().add(p1);
     if(num == 0)
     p1.add(One = new JButton("Admin"));
     One.addActionListener     (this );
     p1.add(Two = new JButton("Buy"));
     Two.addActionListener     (this );
if(num == 1)
     this.dispose();
     p1.add(Three = new JButton("Password"));
     Three.addActionListener (this);
if(num == 2)
     p1.add(Four = new JButton("Product-ID"));
     Four.addActionListener(this);
public void actionPerformed(ActionEvent e)
     if (e.getSource() == One)
          num = 1;
          Frame g = new Frame();
          g.pack();
          g.setVisible(true);
if (e.getSource() == Two )
               num = 2;
               Frame h = new Frame();
          h.pack();
          h.setVisible(true);
     if(e.getSource() == Three )
          System.out.println("Password");
     if(e.getSource() == Four)
               System.out.println("Product-ID");
public static void main(String[] args)
     Frame frame = new Frame();
frame.pack();
frame.setVisible(true);

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