хотя я его не трогал
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;
/*
Обращенные слова
*/
public class Solution {
public static List<Pair> result = new LinkedList<>();
public static void main(String[] args) {
try (BufferedReader fNameReader = new BufferedReader(new InputStreamReader(System.in));
BufferedReader fileReader = new BufferedReader(new FileReader(fNameReader.readLine()))) {
StringBuilder line = new StringBuilder("");
while (fileReader.ready()) {
line.append(fileReader.readLine()).append(" ");
}
String[] words = line.toString().split(" ");
ArrayList<String> listWords = new ArrayList<>();
for (String s : words) {
listWords.add(s.trim());
}
for (String w : words) {
if (listWords.contains(w)) {
listWords.remove(w);
StringBuilder sb = new StringBuilder(w).reverse();
if (listWords.contains(String.valueOf(sb).trim())) {
int x = listWords.indexOf(String.valueOf(sb).trim());
Pair p = new Pair();
p.first = w;
p.second = listWords.get(x);
result.add(p);
listWords.remove(listWords.get(x));
}
}
}
for (Pair z : result) {
System.out.println(z);
}
} catch (IOException exception) {
exception.printStackTrace();
}
}
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;
}
}
}