@Override public boolean accept(File f){
  if (f != null) {
    if (f.isDirectory()) {
      return true;
    }
    String extension=getExtension(f);
    if (extension != null && filters.get(getExtension(f)) != null) {
      return true;
    }
    ;
  }
  return false;
}

@ Override public boolean accept ( File f ) { if ( f != null ) { if ( f . isDirectory ( ) ) { return true ; } String extension = getExtension ( f ) ; if ( extension != null && filters . get ( getExtension ( f ) ) != null ) { return true ; } ; } return false ; }
return true if this file should be shown in the directory pane , false if it shouldn ' t . files that begin with " . " are ignored .
