docs: public static boolean isHexNumber(String value) {
  		final int index = (value.startsWith("-") ? 1 : 0);
  		if (value.startsWith("0x", index) || value.startsWith("0X", index) || value.startsWith("#", index)) {
  			try {
  				Long.decode(value);
  			} catch (NumberFormatException e) {
  				return false;
  			}
  			return true;
  		}else {
  			return false;
  		}
  	}