JSplitPane

I've written a program which will generate a split window:

public class AVIS extends JSplitPane
{
  static      JFrame frame;
  private      JTextField      tf=new JTextField(19);

  public AVIS()
  {
    super(HORIZONTAL_SPLIT);
   
    JScrollPane listScrollPane = new JScrollPane();

           JTabbedPane      tabbedPane=new JTabbedPane();
            tabbedPane.addTab("Nr.1", tf);
            tabbedPane.addTab("Nr.2", tf);         setLeftComponent(listScrollPane);                  setRightComponent(tabbedPane);
   setDividerLocation(150);
   setDividerSize(10);
   setPreferredSize(new Dimension(400, 200));
  }

  public static void main(String s[])
  {
    WindowListener l = new WindowAdapter()
    {
      public void windowClosing(WindowEvent e)       {System.exit(0);
    }
  };
  frame = new JFrame("AVIS");
  frame.addWindowListener(l);          frame.getContentPane().add("Center", new AVIS());          frame.pack();
  frame.setVisible(true);
  }
};

But as I start the program, one can just see a tab "Nr.1", not two tabs "Nr.1" and "Nr.2".
 Why?
chenweiAsked:
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msmolyakConnect With a Mentor Commented:
You normally add a container such as JPanel in the call to addTab(). Try creating two panels and adding each to the corresponding tab, that should fix it. Later you can add the text field (why are you adding the same field to both panels, by the way?) to the panels.
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