but works just fine. It displays all the letters of the alphabet and the number of occurrences of each letter. Am I missing something? Guadalupe? :)
package com.codegym.task.task10.task1012;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/*
Number of letters
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
// Alphabet
String abc = "abcdefghijklmnopqrstuvwxyz";
char[] abcArray = abc.toCharArray();
ArrayList<Character> alphabet = new ArrayList<>();
for (char letter : abcArray) {
alphabet.add(letter);
}
// Read in strings
ArrayList<String> list = new ArrayList<>();
for (int i = 0; i < 10; i++) {
String s = reader.readLine();
list.add(s.toLowerCase());
}
// write your code here
Map<Character , Integer> map = new HashMap<>();
for (int i = 0 ; i < alphabet.size() ; i++){
map.put(alphabet.get(i), 0);
}
for(String s : list){
char [] chars = s.toCharArray();
for(int i = 0; i < chars.length; i++){
map.merge(chars[i], 1, Integer::sum);
}
}
for (Map.Entry<Character , Integer> entry : map.entrySet()){
System.out.println(entry.getKey() + " " + entry.getValue());
}
}
}