binary to hexadecimal in java

1import java.util.Scanner;
2public class BinaryToHexadecimalJava
3{
4   public static void main(String[] args)
5   {
6      int[] hexaDecimal = new int[1000];
7      int a = 1, b = 0, r, decimal = 0, binary;
8      Scanner sc = new Scanner(System.in);
9      System.out.print("Please enter binary number: ");
10      binary = sc.nextInt();
11      while(binary > 0)
12      {
13         r = binary % 2;
14         decimal = decimal + r * a;
15         a = a * 2;
16         binary = binary / 10;
17      }
18      a = 0;
19      while(decimal != 0)
20      {
21         hexaDecimal[a] = decimal % 16;
22         decimal = decimal / 16;
23         a++;
24      }
25      System.out.print("Equivalent hexadecimal value is: ");
26      for(b = a - 1; b >= 0; b--)
27      {
28         if(hexaDecimal[b] > 9)
29         {
30            System.out.print((char)(hexaDecimal[b] + 55) + "\n");
31         }
32         else
33         {
34            System.out.print(hexaDecimal[b] + "\n");
35         }
36      }
37      sc.close();
38   }
39}

1int foo = Integer.parseInt("1001", 2); // 2 is the radix