tryPeekByte
Peek the next unsigned byte or return -1 if no more bytes available for reading. No bytes will be marked as consumed in any case.
Return
an unsigned byte or -1 if not even a byte is available for reading.
Peek the next unsigned byte or return -1 if no more bytes available for reading. No bytes will be marked as consumed in any case.
an unsigned byte or -1 if not even a byte is available for reading.