CRC16 java工具類

public class CRC16 {

	private static int[] table = { 0x0000, 0x8005, 0x800F, 0x000A, 0x801B, 0x001E, 0x0014, 0x8011,
			0x8033, 0x0036, 0x003C, 0x8039, 0x0028, 0x802D, 0x8027, 0x0022, 0x8063, 0x0066, 0x006C,
			0x8069, 0x0078, 0x807D, 0x8077, 0x0072, 0x0050, 0x8055, 0x805F, 0x005A, 0x804B, 0x004E,
			0x0044, 0x8041, 0x80C3, 0x00C6, 0x00CC, 0x80C9, 0x00D8, 0x80DD, 0x80D7, 0x00D2, 0x00F0,
			0x80F5, 0x80FF, 0x00FA, 0x80EB, 0x00EE, 0x00E4, 0x80E1, 0x00A0, 0x80A5, 0x80AF, 0x00AA,
			0x80BB, 0x00BE, 0x00B4, 0x80B1, 0x8093, 0x0096, 0x009C, 0x8099, 0x0088, 0x808D, 0x8087,
			0x0082, 0x8183, 0x0186, 0x018C, 0x8189, 0x0198, 0x819D, 0x8197, 0x0192, 0x01B0, 0x81B5,
			0x81BF, 0x01BA, 0x81AB, 0x01AE, 0x01A4, 0x81A1, 0x01E0, 0x81E5, 0x81EF, 0x01EA, 0x81FB,
			0x01FE, 0x01F4, 0x81F1, 0x81D3, 0x01D6, 0x01DC, 0x81D9, 0x01C8, 0x81CD, 0x81C7, 0x01C2,
			0x0140, 0x8145, 0x814F, 0x014A, 0x815B, 0x015E, 0x0154, 0x8151, 0x8173, 0x0176, 0x017C,
			0x8179, 0x0168, 0x816D, 0x8167, 0x0162, 0x8123, 0x0126, 0x012C, 0x8129, 0x0138, 0x813D,
			0x8137, 0x0132, 0x0110, 0x8115, 0x811F, 0x011A, 0x810B, 0x010E, 0x0104, 0x8101, 0x8303,
			0x0306, 0x030C, 0x8309, 0x0318, 0x831D, 0x8317, 0x0312, 0x0330, 0x8335, 0x833F, 0x033A,
			0x832B, 0x032E, 0x0324, 0x8321, 0x0360, 0x8365, 0x836F, 0x036A, 0x837B, 0x037E, 0x0374,
			0x8371, 0x8353, 0x0356, 0x035C, 0x8359, 0x0348, 0x834D, 0x8347, 0x0342, 0x03C0, 0x83C5,
			0x83CF, 0x03CA, 0x83DB, 0x03DE, 0x03D4, 0x83D1, 0x83F3, 0x03F6, 0x03FC, 0x83F9, 0x03E8,
			0x83ED, 0x83E7, 0x03E2, 0x83A3, 0x03A6, 0x03AC, 0x83A9, 0x03B8, 0x83BD, 0x83B7, 0x03B2,
			0x0390, 0x8395, 0x839F, 0x039A, 0x838B, 0x038E, 0x0384, 0x8381, 0x0280, 0x8285, 0x828F,
			0x028A, 0x829B, 0x029E, 0x0294, 0x8291, 0x82B3, 0x02B6, 0x02BC, 0x82B9, 0x02A8, 0x82AD,
			0x82A7, 0x02A2, 0x82E3, 0x02E6, 0x02EC, 0x82E9, 0x02F8, 0x82FD, 0x82F7, 0x02F2, 0x02D0,
			0x82D5, 0x82DF, 0x02DA, 0x82CB, 0x02CE, 0x02C4, 0x82C1, 0x8243, 0x0246, 0x024C, 0x8249,
			0x0258, 0x825D, 0x8257, 0x0252, 0x0270, 0x8275, 0x827F, 0x027A, 0x826B, 0x026E, 0x0264,
			0x8261, 0x0220, 0x8225, 0x822F, 0x022A, 0x823B, 0x023E, 0x0234, 0x8231, 0x8213, 0x0216,
			0x021C, 0x8219, 0x0208, 0x820D, 0x8207, 0x0202 }; // crc table

	/**
	 * 計算傳入的list的crc值.
	 *
	 * @param list
	 * @return crc值,以小端模式存放的byte數組.
	 */
	public static int[] updateCRC(List<Byte> list) {
		int CRCL = 0x0ff;
		int CRCH = 0x0ff;
		int table_addr;
		for (int b : list) {
			CRCH &= 0xff;
			table_addr = ((b & 0xff) ^ CRCH);
			CRCH = ((table[table_addr] >>> 8) & 0xff) ^ CRCL;
			CRCL = (table[table_addr] & 0x00ff);
		}

		int[] a = { CRCL, CRCH };
		return a;
	}

	public static int[] updateQueueCRC(Queue<Byte> list) {
		int CRCL = 0x0ff;
		int CRCH = 0x0ff;
		int table_addr;
		for (int b : list) {
			CRCH &= 0xff;
			table_addr = ((b & 0xff) ^ CRCH);
			CRCH = ((table[table_addr] >>> 8) & 0xff) ^ CRCL;
			CRCL = (table[table_addr] & 0x00ff);
		}
		int[] a = { CRCL, CRCH };
		return a;
	}

	public static int[] updateCRC(byte[] bt) {
		int CRCL = 0x0ff;
		int CRCH = 0x0ff;
		int table_addr;
		for (int i = 0; i < bt.length; i++) {
			byte b = bt[i];
			CRCH &= 0xff;
			table_addr = ((b & 0xff) ^ CRCH);
			CRCH = ((table[table_addr] >>> 8) & 0xff) ^ CRCL;
			CRCL = (table[table_addr] & 0x00ff);
		}
		int[] a = { CRCL, CRCH };
		return a;
	}