void type not allowed here error fix in java

import java.util.Scanner;

  public class Converter{
    public static void toBinary(int x) {
       

String binary = "";
  while (x > 2 ){
      binary = (x%2) + binary;
       x /= 2;
       }
  }

     }
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));
    }
}