Text Processing - Character Multiplier

package com.company;


import java.util.*;
import java.util.stream.Collectors;

public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String first = scanner.next();
        String second = scanner.next();

        int sum = calcSumCharacters(first, second);
        System.out.println(sum);


    }

    private static int calcSumCharacters(String first, String second) {
        int sum = 0;
        for (int i = 0; i < first.length() && i < second.length(); i++) {//тук внимаваме индекса да е валиден и за двата стринга
            sum += first.charAt(i) * second.charAt(i);        //за да можем да достъпим символа на позиция i
        }
        if (first.length() > second.length()) {
            for (int i = second.length(); i < first.length(); i++) {
                sum += first.charAt(i);

            }
        } else {
            for (int i = first.length(); i < second.length(); i++) {
                sum += second.charAt(i);

            }
        }

        return sum;
    }


}