Чтоб было легче проверять, создаю лист со String и проверяю по ним, а не по листу с Pair
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
reader = new BufferedReader(new FileReader(reader.readLine()));
List<String> wordList = new LinkedList<>();
while (reader.ready()) {
String[] wordsInLine = reader.readLine().split("\\s");
for (String word : wordsInLine) {
String reversedWord = new StringBuilder(word).reverse().toString();
if (wordList.contains(reversedWord)) {
int indexInList = wordList.indexOf(reversedWord);
Pair pair = new Pair();
pair.first = wordList.get(indexInList);
pair.second = word;
if (!result.contains(pair)) {
result.add(pair);
}
} else {
wordList.add(word);
}
}
}
reader.close();
}package com.javarush.task.task22.task2207;
import java.io.*;
import java.util.*;
/*
Обращенные слова
*/
public class Solution {
public static List<Pair> result = new LinkedList<>();
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
reader = new BufferedReader(new FileReader(reader.readLine()));
List<String> wordList = new LinkedList<>();
while (reader.ready()) {
String[] wordsInLine = reader.readLine().split("\\s");
for (String word : wordsInLine) {
String reversedWord = new StringBuilder(word).reverse().toString();
if (wordList.contains(reversedWord)) {
int indexInList = wordList.indexOf(reversedWord);
Pair pair = new Pair();
pair.first = wordList.get(indexInList);
pair.second = word;
if (!result.contains(pair)) {
result.add(pair);
}
} else {
wordList.add(word);
}
}
}
reader.close();
//
// for (Pair pair : result) {
// System.out.println(pair.first + " " + pair.second);
// }
}
public static class Pair {
String first;
String 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 :
second == null ? first :
first.compareTo(second) < 0 ? first + " " + second : second + " " + first;
}
}
}