Вывод как в условии, валидатор не принимает
package com.javarush.task.task22.task2207;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Parameter;
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));
String file = reader.readLine();
reader.close();
List<String> strings = new ArrayList<String>();
BufferedReader fileReader = new BufferedReader(new FileReader(file));
while(fileReader.ready()){
String[] mass = fileReader.readLine().split(" ");
for (int i = 0; i < mass.length; i++) {
strings.add(mass[i]);
}
}
for (int i = 0; i < strings.size() ; i++) {
String first = strings.get(i).trim();
strings.remove(i);
for (int j = 0; j < strings.size(); j++) {
String x = strings.get(j);
StringBuilder str = new StringBuilder(x);
String second = str.reverse().toString().trim();
if (first.equals(second)){
strings.remove(j);
Pair pair = new Pair();
pair.first = first;
pair.second = x;
result.add(pair);
}
}
}
for(Pair res : result){
System.out.println(res.toString());
}
fileReader.close();
}
public static class Pair {
String first;
String second;
public Pair(){}
public Pair(String f,String s){
this.first = f;
this.second = s;
}
@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;
}
}
}