CRC-16 Poly=0x3D65

//POLY=0x3D65 INIT=0x0000 REFIN=FALSE REFOUT=FALSE
public class HelloWorld
{
  private static int crc = 0;

  public static void main(String[] args)
  {
    byte[] bytes = new byte[] {0x73, 0x65, 0x74, 0x79, 0x62, 0x20, 0x32, 0x33, 0x3D, 0x68, 0x74, 0x67, 0x6E, 0x65, 0x6C, 0x20, 0x2C, 0x65, 0x67, 0x61,
                0x73, 0x73, 0x65, 0x6D, 0x20, 0x73, 0x69, 0x20, 0x73, 0x69, 0x68, 0x54};
        calc(bytes);

        System.out.println(Integer.toHexString(crc));
  }


     public static void calc(final byte[] input) {
        for (int i = 0; i < input.length; i++) {
            crc ^= input[i] << 8;

            for (int j = 0; j < 8; j++)
                crc = ((crc & 0x8000) == 0) ? crc << 1 : (crc << 1) ^ 0x3D65;
            crc &= 0xFFFF;
        }

    }
}