How to check client connection

Hai,I need to check whether client is connected with server.For example I have list of 10 clients I need to check whether one of them is connected with server & should not show when called me is returned back to client. Is it possible if yes how plz tell me
[282 byte] By [prasadmcaa] at [2007-10-2 19:23:17]
# 1
Well, you could have each method set a flag on entry and clear the flag on return.
bschauwejavaa at 2007-7-13 21:07:52 > top of Java-index,Core,Core APIs...