Sololearn - Binary Converter challenge

import java.util.Scanner;

//your code goes here
class Converter{
    public static String toBinary(int num){ //remember to include return type as String!
        String binary="";

        //Loop block is given
        while(num > 0) {
        binary = (num%2)+binary;
        num /= 2;
        }
        return binary; //to return the binary string in this method
    }
}

//This is given
public class Program {
    public static void main(String[ ] args) {
        Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        System.out.print(Converter.toBinary(x));
    }
}