Решение соответствует условиям, проверял на различных тестовых примерах.
В чем ошибка?
package com.javarush.task.task22.task2207;
import java.util.*;
import java.io.*;
/*
Обращенные слова
*/
public class Solution {
public static List<Pair> result = new LinkedList<>();
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner(System.in);
String fileName = sc.nextLine();
BufferedReader reader = new BufferedReader(new FileReader(fileName));
StringBuilder text = new StringBuilder();
while (reader.ready()) {
text.append(reader.readLine()+" ");
}
String [] words = text.toString().split(" ");
List <String> abort = new ArrayList<String>();
for (int i=0;i<words.length;i++) {
for (int a=0;a<words.length;a++) {
if (!(abort.contains(words[i])) && words[i].equals(new StringBuilder(words[a]).reverse().toString())) {
result.add(new Pair(words[i],words[a]));
abort.add(words[a]);
abort.add(words[i]);
}
}
}
}
public static class Pair {
String first;
String second;
public Pair() {
}
public Pair (String first, String second) {
this.first=first;
this.second=second;
}
@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 != null ? second :
second == null && first != null ? first :
first.compareTo(second) < 0 ? first + " " + second : second + " " + first;
}
}
}