如何在java中找到一个数字的乘积和位数之和？

public class Main {
    public static void main(String[] args) {
        int number = 12345;
        String numberString = String.valueOf(number);
        int product = 1;
        int sum = 0;

        for (int i = 0; i < numberString.length(); i++) {
            int digit = Character.getNumericValue(numberString.charAt(i));
            product *= digit;
            sum += digit;
        }

        System.out.println("乘积：" + product);
        System.out.println("位数之和：" + sum);
    }
}