Interesting Integer.parseInt() problem

I'm working on a project where I'm being given a string of 0s and 1s and need to mask them against another string of the same. I thought I would convert my string with Integer.parseInt("111",2) but I ran into a problem. You can't parse out 32 bits to an int if the MSB is 1. It throws a NumberFormatException. You can't parse -2147483648 in either radix 2, 8 or 16. My data is of course LSB first so 1 would be 100000000000000000000000000000000 and I can't parse it. Anyway, I thought it was interesting and wondered if anybody knows why this is so?

Thanks,

knute...


public class test {
    public static void main(String[] args) {
//        String str = "1111111111111111111111111111111";
//        String str = "7fffffff";
//        String str = "17777777777";
        int n = Integer.parseInt(str,2);
        System.out.println(n);
    }
}

--

Knute Johnson
email s/nospam/knute/
.

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