com.javarush.test.level18.lesson10.home06

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Map;
import java.util.TreeMap;

public class Solution {
    public static void main(String[] args) throws IOException
    {

        if(args.length == 0){
            throw new IllegalArgumentException();
        }

        String fileName = args[0];
        Map<Character, Integer> result = new TreeMap<>();

        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(fileName));

        while (bis.available() > 0){
            int tmp = bis.read();
            char key = (char) tmp;
            if (result.containsKey(key)){
                int count = result.get(key) + 1;
                result.put(key, count);
            }else {
                result.put(key, 1);
            }
        }

        for (Map.Entry<Character, Integer> unit : result.entrySet()){
            System.out.println(unit.getKey() + " " + unit.getValue());
        }

        bis.close();
    }
}