public static JTextField percentLine = null;

private static String DEFAULT_PERCENT = "90.0";

private static float percentage;

private static JFrame errorWindow;

private static JButton enterPercent;

public JPanel initCustomization()
{
    percentage = new Float(DEFAULT_PERCENT)/100;
    //new panel to contain all the elements
    JPanel percentLinePanel = new JPanel();
    //create text field for user input
    percentLine = new JTextField(5);
    percentLine.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e)
        {
            percentLine.setText(percentLine.getText());
        }
    });
    percentLine.setEditable(true);
    percentLine.setText(DEFAULT_PERCENT);
    percentLine.setPreferredSize(new Dimension(100,25));
    //create label beside text field
    JLabel percentLineLabel = new JLabel();
    percentLineLabel.setText("Enter percent line to display (1-100)%:");
    //create the confirmation button
    enterPercent = new JButton();
    enterPercent.setText("Confirm");
    enterPercent.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e)
        {
            if(checkPercent(percentLine.getText())) //check for valid input
            {
                setPercent(percentLine.getText());
                JOptionPane.showMessageDialog(errorWindow,
                    (percentLine.getText()+"% Line has been set."),"Confirmation",
                    JOptionPane.INFORMATION_MESSAGE);
            }
        }
    });
    enterPercent.setPreferredSize(new Dimension(80,25));

    percentLinePanel.add(percentLineLabel, BorderLayout.WEST);
    percentLinePanel.add(percentLine, BorderLayout.CENTER);
    percentLinePanel.add(enterPercent, BorderLayout.EAST);

    return percentLinePanel;
}

super();

    model = new ObjectTableModel(COLUMNS,
            SamplingStatCalculator.class,
            new Functor[] {
                new Functor("getLabel"),   //$NON-NLS-1$
                new Functor("getCount"),  //$NON-NLS-1$
                new Functor("getMeanAsNumber"),   //$NON-NLS-1$
                new Functor("getMedian"),  //$NON-NLS-1$
                new Functor("getPercentPoint",  //$NON-NLS-1$
                        new Object[] { StatVisualizerAddOn.getPercent() }),         //90% line
                new Functor("getMin"),  //$NON-NLS-1$
                new Functor("getMax"),   //$NON-NLS-1$
                new Functor("getErrorPercentage"),   //$NON-NLS-1$
                new Functor("getRate"),  //$NON-NLS-1$
                new Functor("getKBPerSecond")   //$NON-NLS-1$
            },
            new Functor[] { null, null, null, null, null, null, null, null, null, null },
            new Class[] { String.class, Long.class, Long.class, Long.class, Long.class,
                          Long.class, Long.class, String.class, String.class, String.class });
    clearData();
    init();
}

addon = new StatVisualizerAddOn();
    JPanel percentile = addon.getPanel();
    mainPanel.add(percentile);