can anyone explain whats wrong with my code? public class superString {

public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    String s = in.next();
    int count = 0;
    for (int i = 0; i < s.length(); i++) {
        for (int j = 0; j <= s.length(); j++) {
            try {
                // System.out.println(s.substring(i,j));
                int k = Integer.valueOf(s.substring(i, j));
                if (k==0) {
                    count++;
                } else if ((s.substring(i, j).startsWith("0"))) {
                    count += 0;
                } else {

                    if (k % 6 == 0) {
                        count += 1;
                    }


                }
            }

            catch (Exception e) {

            }
        }

    }
    System.out.println(count);

}

}