java program to convert decimal to hexadecimal using recursion

1// convert decimal to hexadecimal using recursion
2import java.util.Scanner;
3class DecimalToHexaDemo
4{
5   char[] charHexa ={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
6   int num;
7   String strHex = "";
8   String hexadecimal(int h)
9   {
10      if(h != 0)
11      {
12         num = h % 16;
13         strHex = charHexa[num] + strHex;
14         h = h / 16;
15         hexadecimal(h);
16      }
17      return strHex;
18   }
19   public static void main(String[] args)
20   {
21      DecimalToHexaDemo obj = new DecimalToHexaDemo();
22      int decimal;
23      Scanner sc = new Scanner(System.in);
24      System.out.println("Please enter decimal number: ");
25      decimal = sc.nextInt();
26      System.out.println("Hexadecimal number is: ");
27      String hex = obj.hexadecimal(decimal);
28      System.out.println(hex);
29      sc.close();
30   }
31}