В чем моя ошибка?
package com.javarush.task.task18.task1823;
import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/*
Нити и байты
*/
public class Solution {
public static Map<String, Integer> resultMap = new HashMap<String, Integer>();
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String fname;
while (!(fname = reader.readLine()).equals("exit")) {
new ReadThread(fname).start();
}
reader.close();
}
public static class ReadThread extends Thread {
FileInputStream fis;
String filename;
HashMap<Integer, Integer> map = new HashMap<>();
ArrayList<Integer> list = new ArrayList<>();
public ReadThread(String fileName) throws FileNotFoundException {
//implement constructor body
fis = new FileInputStream(fileName);
filename = fileName;
start();
}
@Override
public void run() {
try {
while (fis.available() > 0) {
list.add(fis.read());
}
for (int i = 0; i < list.size(); i++) {
map.put(list.get(i), Collections.frequency(list, list.get(i)));
}
int z = 0;
for (Integer pair : map.values()) {
if (pair > z) {
z = pair;
}
}
synchronized (resultMap) {
for (Map.Entry<Integer, Integer> pair : map.entrySet()) {
if (pair.getValue().equals(z)) {
resultMap.put(filename, pair.getKey());
}
}
}
fis.close();
} catch (IOException e) {
}
}
// implement file reading here - реализуйте чтение из файла тут
}
}