Crooked Digits

import java.util.Scanner;

public class CrookedDigits {
    public static void main(String[] args) {
        Scanner myScan=new Scanner(System.in);
        String numberAsString=myScan.nextLine();
        numberAsString=numberAsString.replace(".","");
        numberAsString=numberAsString.replace("-","");

        while (numberAsString.length()>1){
            int sum=0;
            for (int i = 0; i < numberAsString.length(); i++) {
                sum+=Integer.parseInt(String.valueOf(numberAsString.charAt(i)));
            }
            numberAsString=Integer.toString(sum);
        }
        System.out.println(numberAsString);
    }
}