how to use recursion for converting String to int

Question

I want to convert String input into int using recursion. This is the code I came up with but if my input is 123456 it only returns 124. If I enter 1234567, it gives an error.

import java.util.*;
public class Problem1 {
static int x =0;
static int counter = 0;
//input
 public static void main(String[] args) {
 Scanner scan = new Scanner (System.in);
 String s= scan.nextLine();
 System.out.println(recursive(s));

}
 //recursive method
public static int recursive(String s){
    if(s.length()==1){
        x=(x*10)+ Integer.parseInt(s.substring(0,1));
        return x;
    }
    else{
        x = (x*10)+Integer.parseInt(s.substring(0,1));
        counter++;
        return recursive(s.substring(counter,s.length()-1));


    }

    }
}

Answer 1

import java.util.Scanner;

public class Problem1 {
    static int x = 0;
    static int counter = 0;

    // input
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.nextLine();
        System.out.println(recursive(s));

    }

    // recursive method
    public static int recursive(String s) {
        if (s.length() == 1) {
            x = (x * 10) + Integer.parseInt(s.substring(0, 1));
            return x;
        } else {
            x = (x * 10) + Integer.parseInt(s.substring(0, 1));
            counter++;
            return recursive(s.substring(1, s.length()));

        }

    }
}