This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
I think it would be worthwhile to study the difference between the read(byte) and readFully(byte) methods. For an array as small as 6 bytes it's fairly unlikely that the difference will be noticed, most of the time. However this is the sort of little detail that can lead to rare unexplained errors, so it's good to avoid this problem in the first place if possible.