ReverseString.java

class ReverseString {
    public void reverseString(char[] s) {
       
        for (int i = 0; i < s.length / 2; i++){
        
            char temp = s[i];
            s[i] = s[s.length - i - 1];
            s[s.length - i - 1] = temp;
        }
       
    }
}