ASCII Sum of a String

/*
 * Problem : Process text.
 * Input   : One line of text.
 * Output  : The sum of codes.
 * Approach: Add each character code.
 * Time    : O(n)
 * Space   : O(1)
 * Java    : 8 or newer.
 */
import java.util.Scanner;

public class Main {
    // This method solves the task. It receives the input and returns the answer.
    static long solve(String s) {
        // Step 1: A char is a number in Java. Adding it to an int gives its code.
        long total = 0;
        for (int i = 0; i < s.length(); i++) {
            total += s.charAt(i);
        }
        return total;
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.hasNextLine() ? scanner.nextLine() : "";
        System.out.println(solve(s));
    }
}