java program convert decimal to octal using while loop

1import java.util.Scanner;
2public class DecimalToOctalUsingWhileLoop
3{
4   public static void main(String[] args)
5   {
6      int decimal;
7      Scanner sc = new Scanner(System.in);
8      System.out.println("Please enter decimal number: ");
9      decimal = sc.nextInt();
10      int octalNumber = 0, a = 1;
11      while(decimal > 0)
12      {
13         octalNumber += a * (decimal % 8);
14         decimal = decimal / 8;
15         a = a * 10;
16      }
17      System.out.println("Octal number is: " + octalNumber);
18      sc.close();
19   }
20}