Коллеги, подскажите что не так? Не могу понять что не так сделал
package com.javarush.task.task22.task2207;
import java.io.*;
import java.util.LinkedList;
import java.util.List;
/*
Обращенные слова
*/
public class Solution {
public static List<Pair> result = new LinkedList<>();
public static void main(String[] args) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
String filename = bufferedReader.readLine();
bufferedReader.close();
StringBuilder sb = new StringBuilder();
try(FileReader fr = new FileReader(filename);
BufferedReader reader = new BufferedReader(fr)){
while (reader.ready()){
String line = reader.readLine().replaceAll("\uFEFF", "");
sb.append(line);
}
}catch (Exception e){
e.printStackTrace();
}
String [] words = sb.toString().split(" ");
for (int i = 0; i < words.length; i++){
Pair pair = new Pair();
pair.first = words[i];
for (int j = i+1; j < words.length; j++){
StringBuilder sb1 = new StringBuilder();
sb1.append(words[j]);
if (words[i].equals(sb1.reverse().toString())){
pair.second = sb1.reverse().toString();
if (!result.contains(pair))
result.add(pair);
}
}
}
// for (Pair pair : result){
// System.out.println(pair.first + " " + pair.second);
// }
}
public static class Pair {
String first;
String second;
public Pair(){}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Pair pair = (Pair) o;
if (first != null ? !first.equals(pair.first) : pair.first != null) return false;
return second != null ? second.equals(pair.second) : pair.second == null;
}
@Override
public int hashCode() {
int result = first != null ? first.hashCode() : 0;
result = 31 * result + (second != null ? second.hashCode() : 0);
return result;
}
@Override
public String toString() {
return first == null && second == null ? "" :
first == null ? second :
second == null ? first :
first.compareTo(second) < 0 ? first + " " + second : second + " " + first;
}
}
}