public void loadImage(File f) {
   if (f == null) {
     thumbnail = null;
   } else {
     ImageIcon tmpIcon = new ImageIcon(f.getPath());
     if (tmpIcon.getIconWidth() > 90) {
       thumbnail =
           new ImageIcon(tmpIcon.getImage().getScaledInstance(90, -1, Image.SCALE_DEFAULT));
     } else {
       thumbnail = tmpIcon;
     }
   }
 }