Проверял как многие советуют, все нормально выводит.
package com.javarush.task.task22.task2207;
import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
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) {
String fileName = null;
try(BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
fileName = reader.readLine();
} catch (IOException e) {
e.printStackTrace();
}
List<String> words = new ArrayList<>();
try(BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
while (reader.ready()) {
String[] content = reader.readLine().trim().split("\\s");
words.addAll(Arrays.asList(content));
}
} catch (IOException e) {
e.printStackTrace();
}
for(int i = 0; i < words.size(); i++) {
String first = words.get(i).trim().replaceAll("[^А-Яа-яёЁA-Za-z]", "");
for(int j = i + 1; j < words.size(); j++) {
String second = new StringBuilder(words.get(j)).reverse().toString();
if(first.equals(second)) {
Pair pair = new Pair();
pair.first = first;
pair.second = words.get(j);
result.add(pair);
words.remove(j);
break;
}
}
}
}
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;
}
}
}