Reverse Integer

• https://leetcode.com/problems/reverse-integer/

public class Solution {
    int MAX_INT_DIV_10 = Integer.MAX_VALUE / 10;

    public int reverse(int x) {
        boolean isNegative = x < 0 ? true : false;
        if (isNegative) x = -x;

        int result = 0;
        while ( x > 0) {
            if (result > MAX_INT_DIV_10) return 0;
            int digit = x % 10;
            result = 10 * result + digit;
            x = x / 10;
        }

        if (isNegative) {
            return -result;
        } else {
            return result;
        }
    }
}