Подскажите, пожалуйста, где ошибка,
package com.javarush.task.task19.task1924;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/*
Замена чисел
*/
public class Solution {
public static Map<Integer, String> map = new HashMap<Integer, String>();
static {
map.put(0, "ноль");
map.put(1, "один");
map.put(2, "два");
map.put(3, "три");
map.put(4, "четыре");
map.put(5, "пять");
map.put(6, "шесть");
map.put(7, "семь");
map.put(8, "восемь");
map.put(9, "девять");
map.put(10, "десять");
map.put(11, "одиннадцать");
map.put(12, "двенадцать");
}
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader (new InputStreamReader (System.in));
String fileName = reader.readLine();
reader.close();
BufferedReader buff = new BufferedReader (new FileReader (fileName));
StringBuilder builder = new StringBuilder ();
while (buff.ready()) {
String str = buff.readLine();
String[] strings = str.substring(0, str.length()-1).split(" ");
for (int i = 0; i < strings.length ; i++) {
try {
int number = Integer.parseInt(strings[i]);
if(map.containsKey(number)) {
strings[i] = map.get(number);
}
builder = i == strings.length - 1? builder.append(strings[i] + ".\n"):
builder.append(strings[i] + " ");
} catch (NumberFormatException e) {
builder = i == strings.length - 1? builder.append(strings[i] + ".\n"):
builder.append(strings[i] + " ");
}
}
}
System.out.println(builder.toString().trim());
buff.close();
}
}