DecimalToBinary (10'luk tabandaki sayıyı 2'lik tabana çevirme)

import java.util.Scanner;

public class DecimalToBinary {
public static void main(String [] args){
//Taking input from user

Scanner input = new Scanner(System.in);

System.out.print("Enter a positive integer:");

int x=input.nextInt();

//Taking be a string to integer and goes to method

System.out.println(""+toBinary(x));

}
public static String toBinary(int n){

//This program calculates just positive integers
if(n<=-1){
System.out.println("Please write positive integer");
return null;
}
//Necessary calculation to convert decimal to binary
String binary ="";
while(n>0){
int remaining = n%2;
binary=remaining+binary;
n/=2;

}
binary = n+binary;

return binary;

}
}