Reverse Stringeasy

import java.util.*;

public class Main {
    public static void reverseString(char[] s) {
        // TODO: reverse s in-place using two pointers
    }

    public static void main(String[] args) {
        char[] s = {'h', 'e', 'l', 'l', 'o'};
        reverseString(s);
        System.out.println(new String(s)); // "olleh"
    }
}