public static FileObject resolveFileObject(FileObject folder, String filename) {
    try {
      return folder.resolveFile(filename);
    } catch (FileSystemException ex) {
      return null;
    }
  }
Returns a file representation

@param folder   A folder
@param filename A filename
@return a file contained in a given folder
olv-vfs/src/main/java/pl/otros/vfs/browser/util/VFSUtils.java