* @return The hexadecimal representation of the byte array. If bytes is
* null, "null" string is returned
*/
* @return The hexadecimal representation of the byte array. If bytes is
* null, "null" string is returned
*/
char arr[] = Long.toHexString(val).toCharArray();
StringBuffer buf = new StringBuffer();
// prepend the right number of leading zeros
char arr[] = Long.toHexString(val).toCharArray();
StringBuffer buf = new StringBuffer();
// prepend the right number of leading zeros