If statement

[tberger1]

I am having a block - I am writing a program that will receive a series of numbers entered in by the user. I need to test to make sure that the number is not negative but also that I truly have a number (not a letter or special character). The first part is easy

if (numbEntered[x] <0)
throw new Exception("enter a number 0 or above")

what I am not sure is how to test for to make sure they entered a number.

Any help is appreciated.
TJ

 

[feherke]

Hi

how to test for to make sure they entered a number

Probably you read the user's input as [tt]String[/tt]. So use [tt]Integer.parseInt()[/tt] ( or [tt]Double.parseDouble()[/tt] or whatever you properly need ) on that [tt]String[/tt]. If it throws a [tt]NumberFormatException[/tt], then the value is not numeric.

Feherke.

http://rootshell.be/~feherke/