public class Util {
public static long toLong(byte[] b) {
long n = (long) (b[0] & 0xff) << 56 | (long) (b[1] & 0xff) << 48
| (long) (b[2] & 0xff) << 40 | (long) (b[3] & 0xff) << 32
| (long) (b[4] & 0xff) << 24 | (long) (b[5] & 0xff) << 16
| (long) (b[6] & 0xff) << 8 | (long) (b[7] & 0xff);
return n;
}
}