我想让JFileChooser的savedialogue在按了approve后仍能保持一会，怎么办？

Question

public static void main(String[] args)
{
    try
    {
        JFileChooser fc = new JFileChooser()
        {
            public void approveSelection()
            {
                if(JOptionPane.OK_OPTION == JOptionPane.showConfirmDialog(this, "确认？"))
                    super.approveSelection();
            }
        };
        fc.showSaveDialog(null);
        System.exit(0);
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}