public static String sha3String(String utf8String) {
        return Numeric.toHexString(sha3(utf8String.getBytes(StandardCharsets.UTF_8)));
    }
public static String sha3String ( String utf8String ) { return Numeric . toHexString ( sha3 ( utf8String . getBytes ( StandardCharsets . UTF_8 ) ) ) ; }
Keccak-256 hash function that operates on a UTF-8 encoded String.

@param utf8String UTF-8 encoded string
@return hash value as hex encoded string