code: public static String convertToHex(long value) {
  		StringBuilder SB = new StringBuilder(16);
  		try {
  			convertToHex(value, SB);
  		} catch(IOException e) {
  			throw new AssertionError(e);
  		}
  		return SB.toString();
  	}
docs: Converts a long integer to a full 16-character hex code.