Search code examples
numberformatexception

NumberFormatException while converting from string to integer in servlet

I know ths is a common question here. I have read the solutions and modified the code then also i am not getting the solution so I have posted my code here.

when I read a value from the text box and parse the value into int from String in servlet, why does it show NumberFormatException?

  String ph=request.getParameter("phone");
  int phone=Integer.parseInt(ph.trim());// exception is generated here
Solution

  • You can't have any characters or symbols in an int AND the maximum size of an int is 2,147,483,647 which means the phone number 555 555 5555 would be to large to store in an int.

    Change the parse to a long and it should fix your problem

    A good rule to follow is do not store any number like SSN or Phone numbers's in numerical primitives. You want to leave the numerical primitives for values you plan on doing something math related. Keep them as strings if at all possible.