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From: Eric Sosman <esosman@ieee-dot-org.invalid>
Newsgroups: comp.lang.java.help
Subject: Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()?
Date: Fri, 01 Jul 2011 23:06:25 -0400
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On 7/1/2011 1:53 PM, Thee Chicago Wolf [MVP] wrote:
>
> Doing homework for a programming course and we're given a 1000 digit
> String which we have to convert to integer, load into an array, and
> then find the largest product of a group of 5 integers. I know I can
> use the Integer.parseInt( ) method [...]

     You'd better hope that most of those digits are zeroes...

     It seems likely that the homework assignment is intended to make
you think about other ways than `int' or even `long' for representing
integers.  Representations that can handle this sort of count-all-the-
protons-in-the-universe-if-every-actual-proton-were-a-universe-itself
kind of magnitude.  Java provides at least two such things; I think
you're being encouraged to discover and use one or both of them.

> but I wanted to play around with
> the toInt() method. From what I can gather, it's essentially the same
> thing...basically the opposite to the toString() method. So, I've
> tried a few things and I can't get it to work the way I want.

     I've never heard of toInt(), and neither has my copy of the
Java API documentation.  Go back to where you obtained it, and see
whether the supplier describes it.

> Here's a stripped down version of what I'd like to do.
>
> public class thousand_digit_string
> {
>   public static void main(String[] args)
>   {
> 	int oneBigInt=0;
> 	String num = "450";
> 	oneBigInt = toInt(num);
> }
>
> How can I use it properly?
>
> I've also seen mention of
>
> static int toInt(java.lang.String str, int defaultValue)
>
> and
>
> NumberUtils.toInt()

     Check with whoever provided the NumberUtils class.  It doesn't
come with Java; somebody else must have written it.

-- 
Eric Sosman
esosman@ieee-dot-org.invalid