// 位元組到浮點轉換
	public static double byteToDouble(byte[] b,int offset) {
		long l;
		l = b[offset+0] & 0xff;
		l |= (((long) (b[offset+1] & 0xff)) << 8);
		l |= (((long) (b[offset+2] & 0xff)) << 16);
		l |= (((long) (b[offset+3] & 0xff)) << 24);
		l |= (((long) (b[offset+4] & 0xff)) << 32);
		l |= (((long) (b[offset+5] & 0xff)) << 40);
		l |= (((long) (b[offset+6] & 0xff)) << 48);
		l |= (((long) (b[offset+7] & 0xff)) << 56);
		
		return Double.longBitsToDouble(l);
	}	
	public static int byteToInt(byte[] b, int offset){
		int i;
		i = b[offset+0] & 0xff;
		i |= (b[offset+1] & 0xff)<<8;
		i |= (b[offset+2] & 0xff)<<16;
		i |= (b[offset+3] & 0xff)<<24;
		
		return i;
	}
	public static short byteToShort(byte[] b, int offset){
		int i;
		i = b[offset+0] & 0xff;
		i |= (b[offset+1] & 0xff)<<8;
		
		return (short)i;
	}