O8. Letters Change Numbers / Text Processing - Exercise

package Alex;

import java.util.Scanner;

public class O8LettersChangeNumbers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] input = scanner.nextLine().split("\\s+");
        double finalScore = 0.0;

        for (String currentString : input) {
            char firstLetter = currentString.charAt(0);
            char lastLetter = currentString.charAt(currentString.length() - 1);
            String number = currentString.substring(1, currentString.length() - 1);

            long num = Long.parseLong(number);
            double result;

            if (Character.isUpperCase(firstLetter)) {
                result = num * 1.0 / (firstLetter - 64);
            } else {
                result = num * (firstLetter - 96);
            }
            if (Character.isUpperCase(lastLetter)) {
                result -= (lastLetter - 64);
            } else {
                result += (lastLetter - 96);
            }
            finalScore += result;
        }
        System.out.printf("%.2f", finalScore);
    }
}