Write a Java program and compute the sum of the digits of an integer

import java.util.Scanner;
public class Exercise33 { 
 public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("Input an integer: ");
        long n = input.nextLong();
        System.out.println("The sum of the digits is: " + sumDigits(n));

    }

    public static int sumDigits(long n) {
        int sum = 0;
        while (n != 0) {
            sum += n % 10;
            n /= 10;
        }
        return sum;
    }
}

Sample Output:

Input an intger: 25                                                                                           
The sum of the digits is: 7