IsNumeric for String?

Question

I was just wondering how to check whether e.g. a value in a textField is numeric or not.
isNumeric seems to take char as a parameter, but what if you are using strings? Should it be converted to a char array or what?
The main problem is that if I take values from TextFields and do Math.parseInt(string) I get errors if the value in the TextField is not numeric.
It would be great if someone could help.

Answer 1

Assuming you're just after integer values:
boolean isInteger(String s)
  char[] sChars = s.toCharArray();
  for (int i = 0; i < sChars.length(); i++)
    if (!sChars.isDigit())
return false;
return true;
OR
boolean isInteger(String s)
  try
    Integer.parseInt(s)
  catch (NumberFormatException e)
    return false;
  return true;
}Personally I prefer the first, as it doesn't rely on Exceptions for processing logic.