Splitting and converting String to int

Question

I have a problem with my code. I read a couple of numbers of a text-file. For example: Textfile.txt

1, 21, 333

With my following code I wan

Answer 1

A couple of problems:

1. factor should be multiplied by 10 in every loop
2. answer and factor should be re-initialized between the numbers you're parsing:

---

String line = "1,21,333";
for (String retval : line.split(",")) {
    int answer = 0;
    int factor = 1;
    for (int j = retval.length() - 1; j >= 0; j--) {
        answer = answer + (retval.charAt(j) - '0') * factor;
        factor *= 10;
    }
    System.out.println(answer);
    answer = (answer - answer);
}

OUTPUT

1
21
333