JFileChooser file name extention queistion

Question

hi i would like to know if it is possible to place a file extention in the filename section when you open the save dialog. So as when the user types a file name in the file extention is added automaticly to only allow the user to save in .png. My code is as follows.
private void screenshot()
          /** currently no dialog to confirm action as remains
          on screen when saving screenshot! **/
          int status;
          JFileChooser fc = new JFileChooser();
          fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
          try {
                    Rectangle rect = new Rectangle(Toolkit.getDefaultToolkit ().getScreenSize ());
                    BufferedImage image = new Robot().createScreenCapture(rect);
                    try {
                         fc.addChoosableFileFilter(new PNGFilter());
                        status = fc.showSaveDialog(information);
                        if(status == JFileChooser.APPROVE_OPTION)
                        File selFile = fc.getSelectedFile();
                        ImageIO.write(image, "png", selFile);
                        JOptionPane.showMessageDialog(information, "File saved to "+ selFile);     
                    } catch (IOException e) {
                              Error.SaveError(e);
                    catch (AWTException e) {
                         Error.AbstractWindowToolkit(e);
}

Answer 1

You can always check selFile's name, and if it
doesn't end with .png replace it
with a new File with the same name, but with .png
added on.Thanks for that. I have done just that and it works great now.
if(getExtension(selFile).equals("NO_EXTENSION"))
                           selFile = new File(selFile.toString() + ".png");
                       }