Pcap isn't a format specific to Wireshark, Wireshark just happens to be able to both perform a packet capture and save it in a pcap format, as well as process pcap files for you to view, so you could probably remove the Wireshark part of the question and just ask how to manipulate pcap files using java. This would be far easier than trying to work out how to use Java to work with Wireshark to produce the resultant packet capture.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.