public class PrintDigits {

    public static void main(String[] args) {

        int n = 123;
        System.out.println(n % 10);

        n = n / 10; // n is now 12, not 12.3 because n is an integer
        System.out.println(n % 10);

        n = n / 10; // n is now 1, again, not 1.2
        System.out.println(n % 10);
    }

}