public void addBytes(byte[] value, int offset, int length) {
    add(Murmur3.hash64(value, offset, length));
  }
Java's default charset will be used for strings.
@param val
         - input string
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/common/ndv/hll/HyperLogLog.java