Problem with opening new JPanel when separated into different classes

[Stacy Eleuterius]

I have put my JPanels into separate classes for ease of maintainability. Now I am having problems using the actionevent to get the new panel to come up. How do I do this?
I am trying to open up the jPanel from the class NewPanel from the actionevent located in class Frame1.
Thanks for your assistance.
Code:

package abc; 
import javax.swing.UIManager; 
import java.awt.*; 
public class Application1 { 
boolean packFrame = false; 
/**Construct the application*/ 
public Application1() { 
Frame1 frame = new Frame1(); 
//Validate frames that have preset sizes 
//Pack frames that have useful preferred size info, e.g. from their layout 
if (packFrame) { 
frame.pack(); 
} 
else { 
frame.validate(); 
} 
//Center the window 
Dimension screenSize = Toolkit.getDefaultToolkit ().getScreenSize(); 
Dimension frameSize = frame.getSize(); 
if (frameSize.height > screenSize.height) { 
frameSize.height = screenSize.height; 
} 
if (frameSize.width > screenSize.width) { 
frameSize.width = screenSize.width; 
} 
frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2); 
frame.setVisible(true); 
} 
/**Main method*/ 
public static void main(String[] args) { 
try { 
UIManager.setLookAndFeel 
(UIManager.getSystemLookAndFeelClassName()); 
} 
catch(Exception e) { 
e.printStackTrace(); 
} 
new Application1(); 
} 
} 
----------------------------------
package abc; 
import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 
public class Frame1 extends JFrame { 
JPanel contentPane; 
BorderLayout borderLayout1 = new BorderLayout(); 
JButton jButton1 = new JButton(); 
/**Construct the frame*/ 
public Frame1() { 
enableEvents(AWTEvent.WINDOW_EVENT_MASK); 
try { 
jbInit(); 
} 
catch(Exception e) { 
e.printStackTrace(); 
} 
} 
/**Component initialization*/ 
private void jbInit() throws Exception { 
jButton1.setText("New Panel Button"); 
jButton1.addActionListener(new java.awt.event.ActionListener () { 
public void actionPerformed(ActionEvent e) { 
jButton1_actionPerformed(e); 
} 
}); 
//setIconImage(Toolkit.getDefaultToolkit().createImage (Frame1.class.getResource("[Your Icon]"))); 
contentPane = (JPanel) this.getContentPane(); 
contentPane.setLayout(borderLayout1); 
this.setSize(new Dimension(400, 300)); 
this.setTitle("Frame Title"); 
contentPane.add(jButton1, BorderLayout.NORTH); 
} 
/**Overridden so we can exit when window is closed*/ 
protected void processWindowEvent(WindowEvent e) { 
super.processWindowEvent(e); 
if (e.getID() == WindowEvent.WINDOW_CLOSING) { 
System.exit(0); 
} 
} 
void jButton1_actionPerformed(ActionEvent e) { 
NewPanel xxx= new NewPanel(); 
} 
} 
---------------------------------------- 
package abc; 
import javax.swing.*; 
public class NewPanel { 
JPanel jPanel1 = new JPanel(); 
JLabel jLabel1 = new JLabel(); 
public NewPanel() { 
try { 
jbInit(); 
} 
catch(Exception e) { 
e.printStackTrace(); 
} 
} 
private void jbInit() throws Exception { 
jLabel1.setText("This is the new panel"); 
jPanel1.add(jLabel1, null); 
} 
} 

[This message has been edited by Stacy Eleuterius (edited March 14, 2001).]