[Java] 단어 뒤집기

import java.util.ArrayList;
import java.util.Scanner;

public class Main {
    public ArrayList<String> solution(int n, String[] strings) {
        ArrayList<String> answer = new ArrayList<>();

        for (String x : strings) {
            char[] s = x.toCharArray();
            int lt = 0, rt = x.length() - 1;
            while (lt < rt) {
                char tmp = s[lt];
                s[lt] = s[rt];
                s[rt] = tmp;
                lt++;
                rt--;
            }
            String tmp = String.valueOf(s);
            answer.add(tmp);
        }

        return answer;

    }

    public static void main(String[] args) {
        Main main = new Main();
        Scanner scanner = new Scanner(System.in);

        int n = scanner.nextInt();
        String[] strings = new String[n];
        for (int i = 0; i < n; i++) {
            strings[i] = scanner.next();
        }

        for (String string : main.solution(n, strings)) {
            System.out.println(string);
        }
    }
}