Panel class not adding to main panel...

Question

I have a panel class that has a borderlayout which is to be nested in another panel with a borderlayout. I'm not sure what I'm doing wrong. Here is my code for the problematic classes:
1st: Panel that needs to be added:
public class SizePanel extends JFrame
     private JPanel sizePanel;
     private JPanel selectedSizePanel;
     private JList sizeList;
     private JScrollPane scrollPane;
     private JTextField selectedSize;
     private JLabel sizeLbl;
     private String[] sizes = {"Starter", "Standard", "Better", "Best" };
     public SizePanel()
          setLayout(new BorderLayout());
          buildSizePanel();
          buildSelectedSizePanel();
          add(sizePanel, BorderLayout.CENTER);
          add(selectedSizePanel, BorderLayout.SOUTH);
          pack();
          setVisible(false);
     private void buildSizePanel()
          sizePanel = new JPanel();
          sizeList = new JList(sizes);          
          sizeList.setSelectionMode(
                    ListSelectionModel.SINGLE_SELECTION);          
          sizeList.addListSelectionListener(
                    new ListListener());     
          sizeList.setVisibleRowCount(4);     
          scrollPane = new JScrollPane(sizeList);     
          sizePanel.add(scrollPane);
     private void buildSelectedSizePanel()
          selectedSizePanel = new JPanel();          
          sizeLbl = new JLabel("Price: ");     
          selectedSize = new JTextField(9);     
          selectedSize.setEditable(false);     
          selectedSizePanel.add(sizeLbl);
          selectedSizePanel.add(selectedSize);
     private class ListListener implements ListSelectionListener
          public void valueChanged(ListSelectionEvent e)
               String selection = (String) sizeList.getSelectedValue();
               selectedSize.setText(selection);
}2nd: My code for adding it to the main panel:
public HouseCalcGUI() {
        setTitle("McKeown's Real Estate Program");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());
        greetingPnl = new GreetingPanel();
        featuresPnl = new FeaturesPanel();
        sizePnl = new SizePanel();
        stylePnl = new StylePanel();
        buildButtonPanel();
        add(greetingPnl, BorderLayout.NORTH);
        add(stylePnl, BorderLayout.EAST);
        add(featuresPnl, BorderLayout.CENTER);
        add(sizePnl, BorderLayout.WEST);
        add(buttonPanel, BorderLayout.SOUTH);
        pack();
        setVisible(true);
    }

Answer 1

Hey, guess what I just did...? BANGED MY HEAD AGAINST THE WALL. Your ingeniousness is in the form of my stupidity. Thank you though. Here are your dukes...What I did was take some sample program from my text to make my program.