How to get the separate digits of an int number?

Question

I have numbers like 1100, 1002, 1022 etc. I would like to have the individual digits, for example for the first number 1100 I want to have 1, 1, 0, 0.

How can I get

Answer 1

This uses the modulo 10 method to figure out each digit in a number greater than 0, then this will reverse the order of the array. This is assuming you are not using "0" as a starting digit.

This is modified to take in user input. This array is originally inserted backwards, so I had to use the Collections.reverse() call to put it back into the user's order.

    Scanner scanNumber = new Scanner(System.in);
    int userNum = scanNumber.nextInt(); // user's number

    // divides each digit into its own element within an array
    List checkUserNum = new ArrayList();
    while(userNum > 0) {
        checkUserNum.add(userNum % 10);
        userNum /= 10;
    }

    Collections.reverse(checkUserNum); // reverses the order of the array

    System.out.print(checkUserNum);