split int value into separate digits

Question

I want to split my int value into digits. eg if the no. is 542, the result should be 5,4,2.

I have 2 options. 1) Convert int into String & then by using getCharA

Answer 1

Use the mod 10 rule...

 List<Integer> digits = new ArrayList<Integer>();
 while (n > 0) {
     digits.add(n%10);
     n/=10;
 }

Answer 2

List<Integer> digits(int i) {
    List<Integer> digits = new ArrayList<Integer>();
    while(i > 0) {
        digits.add(i % 10);
        i /= 10;
    }
    return digits;
}