Tabbed Panes

I am taking a class in JAVA and I have several little programs written in separate classes. Now I need to add these to a TabbedPane. I can create a tabbed pane that display messages and the tab names, but what do I do to get my tabs to bring up my programs. Here is a snipped of the code I have. Which displays the tab with the a "Welcome" message and labels the tab Tab#1. Now I need to be able to tell this tab to put the program there so I can run it from the tab. Thanks for any help anyone can provide.

public class TabbedPane extends JFrame
{

public TabbedPane()
{
super( "Test Company Name " );

JTabbedPane tab = new JTabbedPane();

JLabel l1 = new JLabel( "Welcome", SwingConstants.CENTER );
JPanel p1 = new JPanel();
p1.add( l1 );
tab.addTab( "Tab#1", null, p1, " Panel #1" );