Вроде всё верно...
package com.javarush.task.task22.task2207;
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.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
/*
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));
FileReader fileReader = new FileReader(bufferedReader.readLine());
BufferedReader bufferedReader1 = new BufferedReader(fileReader);
StringBuilder stringBuilder = new StringBuilder();
while (bufferedReader1.ready()){
stringBuilder.append(bufferedReader1.readLine());
stringBuilder.append(" ");
}
List<String> list = Arrays.asList(stringBuilder.toString().split(" "));
for (int i = 0; i < list.size(); i++) {
for (int j = 1; j < list.size(); j++) {
StringBuilder word = new StringBuilder(list.get(j));
if (list.get(i).equals(word.reverse().toString())) {
if (!result.contains(new Pair(list.get(i), list.get(j))))
result.add(new Pair(list.get(i), list.get(j)));
}
}
}
System.out.println(result);
}
public static class Pair {
String first;
String second;
public Pair(String first, String second) {
this.first = first;
this.second = 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 ;
}
}
}