BufferedReader Events?

I'm trying to make a simple instant messenger in java to practice with packets. I've made a messenger client that can send messages but I'm having trouble receiving them. I've got a "server" program that displays messages I send it but now I got to go to the next step and display messages inside the messenger. The problem is, I can't create a loop to check is the BufferedReader has information in the next line like in my server program because It would be frozen; waiting for packets. So I need to somehow be able to spring an event once I receive a packet message. I've been trying to google this but I'm not sure if BufferedReader events exist. If one doesn't, can someone recommend how I can go about doing this?

http://img811.imageshack.us/img811/3598/21679627.png

Server code:

Code:

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while((inputLine = in.readLine()) != null)
                {
                        System.out.println(inputLine);
                }

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can you please post your client and server code? thanks

Seeing the code is not necessary for answering the question.... :eek: