public static String toString(final byte[] b) {
    if (b == null) {
      return null;
    }
    return toString(b, 0, b.length);
  }
Convert a byte[] into a string. Charset is assumed to be UTF-8.
@param b Presumed UTF-8 encoded byte array.
@return String made from <code>b</code>
hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java