не проходит валидацию, в чем может быть причина? вывод по примеру с условия соответствует
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.*;
/*
Обращенные слова
*/
public class Solution {
public static List<Pair> result = new LinkedList<>();
public static void main(String[] args) {
List<String> list = new ArrayList<>();
StringBuilder temp = new StringBuilder();
try (BufferedReader reader1 = new BufferedReader(new InputStreamReader(System.in));
BufferedReader reader = new BufferedReader(new FileReader(reader1.readLine()))) {
while (reader.ready()) {
temp.append(reader.readLine()).append(" ");
}
Collections.addAll(list, temp.toString().replace("\n", " ").split(" "));
for (int i = 0; i < list.size(); i++) {
if (arrayHaveReverse(list, list.get(i))) {
Pair pair = new Pair();
pair.first = list.get(i);
pair.second = getReverse(list.get(i));
if (pairNotHaveString(result, pair)) {
result.add(pair);
}
}
}
}
catch (IOException e) {
e.printStackTrace();
}
for (Pair x : result) {
System.out.println(x.toString());
}
}
public static boolean arrayHaveReverse(List<String> array, String word) {
StringBuilder temp = new StringBuilder(word);
for (String x : array) {
if (x.equals(temp.reverse().toString())) {
return true;
}
}
return false;
}
public static String getReverse(String word) {
StringBuilder stringBuilder = new StringBuilder(word);
return stringBuilder.reverse().toString();
}
public static boolean pairNotHaveString(List<Pair> list, Pair example) {
for (Pair x : list) {
if (x.equals(example)) {
return false;
}
}
return true;
}
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;
}
}
}