Java - Messaging

import java.util.Scanner;
import java.text.DecimalFormat;
import java.util.Arrays;
import java.util.List;
import java.util.ArrayList;
import java.util.Collections;
import java.util.stream.Collectors;

public class Main {

    public static void main (String [] args){
        Scanner scanner = new Scanner(System.in);

        List<Integer> numbers = Arrays.stream(scanner.nextLine()
        .split(" ")).map(Integer::parseInt)
        .collect(Collectors.toList());// List of numbers

        String text = scanner.nextLine();// String

        List<String> list = Arrays.stream(text.split(""))
        .collect(Collectors.toList());// Turns the string into List

        List<String> result = new ArrayList<>();// Empty list for the output

        for (int i=0; i<numbers.size(); i++){// For loop, repeats for each number in the number list
            int element = digitsSum(numbers.get(i));// The char position in the string; comes from the method below

            if (element>=list.size()){// If the char position is beyond the list size, start counting from 0
                element = element - list.size();
            }
            result.add(list.get(element));// Takes the character and puts it in the result list
            list.remove(element);// Removes the character from the original list
        }

        for (String letter : result){// Prints the final result as string
            System.out.print(letter);
        }
    }

    public static int digitsSum (int number){// Method to get the sum of digits from a number
        String temp = "" + number;
        int result = 0;

        for (int i=0; i<temp.length(); i++){
            result+=(int)temp.charAt(i) - 48;
        }
        return result;
    }
}