code: static String getFullPathName(byte[][] names) {
      StringBuilder fullPathName = new StringBuilder();
      for (int i = 1; i < names.length; i++) {
        byte[] name = names[i];
        fullPathName.append(Path.SEPARATOR_CHAR)
          .append(DFSUtil.bytes2String(name));
      }
      return fullPathName.toString();
    }
docs: Return the name of the path represented by the byte array