int value whose byte representation is the given 4 bytes, in big-endian
order; equivalent to Ints.fromByteArray(new byte[] {b1, b2, b3, b4}).long value whose byte representation is the given 8 bytes, in big-endian
order; equivalent to Longs.fromByteArray(new byte[] {b1, b2, b3, b4, b5, b6, b7, b8}).