security - Java networking? -

first off, before ask, point out question education. want know expand understanding of java , network security (what little there is).

how use java network security , counter attacks? have been using server/sockets while (for non system security stuffs), don't quite understand i'm doing. naturally, should learn on networking, start? there protocol everything, heck there protocols have protocols. further expand, how use java say, port sniff, catch packets or kill/open port remotely?

i guess phrase question more adequately; know of sources @ more in depth look/study of how java handles network security , counter hacking , malware containment?

how use java say, port sniff, catch packets or kill/open port remotely?

you can't use java sniff ports.

you can't use java catch packets.

you can't use java kill/open port remotely.

how java handles network security , counter hacking , malware containment?

java doesn't handle network security other internally own applications via security sandbox.

java doesn't handle counter hacking.

java doesn't handle malware containment other internally own applications via security sandbox , bytecode verifier.

one of things above can done via add-on java, java isn't correct tool job.