HASHMAP Сумма всех чисел равна 1.0

import jdk.internal.org.objectweb.asm.tree.analysis.Value;
 
import java.util.HashMap;
import java.util.Locale;
import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
 
        Scanner scan = new Scanner(System.in).useLocale(Locale.US);
        System.out.print("Задайте стрічку: ");
        String  givenString = scan.nextLine();
 
        HashMap<Character, Double> probability = new HashMap<Character, Double>();
 
        probability.put('a', Math.random());
        probability.put('b', Math.random());
        probability.put('c', Math.random());
        probability.put('d', Math.random());
        probability.put('e', Math.random());
        probability.put('f', Math.random());
        probability.put('g', Math.random());
        probability.put('h', Math.random());
        probability.put('i', Math.random());
        probability.put('j', Math.random());
        probability.put('k', Math.random());
        probability.put('l', Math.random());
        probability.put('m', Math.random());
        probability.put('n', Math.random());
        probability.put('o', Math.random());
        probability.put('p', Math.random());
        probability.put('q', Math.random());
        probability.put('r', Math.random());
        probability.put('s', Math.random());
        probability.put('t', Math.random());
        probability.put('u', Math.random());
        probability.put('v', Math.random());
        probability.put('w', Math.random());
        probability.put('x', Math.random());
        probability.put('y', Math.random());
        probability.put('z', Math.random());
 
 
        ShannonFano sfcx = new ShannonFano(givenString, probability);
        System.out.println(sfcx);
 
    }
}