Reverse A String using Recursion

public class ReverseAString {

       public static void main(String[] args) {

             ReverseAString ras = new ReverseAString();

             System.out.println(ras.reverseString("checkit"));

       }

       public String reverseString(String input) {

             return input.isEmpty() ? input : reverseString(input.substring(1)) + input.charAt(0);

       }

}