class crc
{
public static int get_CRC(byte[] buf)
{
	int crc = 0;
	int i;
	for (int index = 0; index != buf.length; ++index) {
		for (i = 0x80; i != 0; i >>>= 1) {
			if ((crc & 0x8000) != 0) {
				crc <<= 1;
				crc ^= 0x1021;
			} else {
				crc <<= 1;
			} 
			if ((buf[index] & i) != 0) {
				crc ^= 0x1021;
			}
		}
	}
	return crc;
}
public static void main(String[] args)
{
	byte[] buf = {0x31, 0x14, 0x15, (byte)0x92, 0x66};
	System.out.println(get_CRC(buf));
}
}

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