Program in Java: Reverse of a string using recursion

Program in Java: Reverse of a string using recursion

 import java.util.Scanner;
class reverse
{
    String rev(String s,int l) //s string and l is length of the string
    {
        if(s.length()==0)
            return "";
        return s.charAt(l-1)+rev(s.substring(0,l-1),l-1);
    }
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter a word:");
        String str = sc.next();
        reverse ob = new reverse();
        int n = str.length();
        String r = ob.rev(str,n);
        System.out.println("The reverse:"+r);
    }
}