calculate MD5 checksum for a file

I want to write a java program to calculate MD5 checksum for a tomcat
file downloaded from apache's site:
http://www.apache.org/dist/tomcat/tomcat-5/v5.5.17/bin/apache-tomcat-5.5.17.exe.MD5

0bb2827c5eacf570b6064e24e0e6653b *apache-tomcat-5.5.17.exe

Here's the code I wrote, but I got the result
740171421a803f50dd573fd38b469a9b, which is different from the one in
tomcat's site. I am using the hex result.

byte[] b = createChecksum(args[0]);
for (int i=0; i<b.length; i++)
{
   String s = Integer.toString( ( b[i] & 0xff ) + 0x100, 16 /* radix */
).substring( 1 );
   System.out.print(s);
}

   public static byte[] createChecksum(String filename) throws
Exception{
     InputStream fis = new FileInputStream(filename);

     byte[] buffer = new byte[1024];
     MessageDigest complete = MessageDigest.getInstance("MD5");
     int numRead;
     do {
      numRead = fis.read(buffer);
      if (numRead > 0) {
        complete.update(buffer, 0, numRead);
        }
      } while (numRead != -1);
     fis.close();
     return complete.digest();
  }

Any ideas why? please advise.

thanks!!