Working with request and respond in Java.. Help needed.

Question

I'm currently working on making a old time- multiplayer shooter in java.
It will have a TCP server, that got all the games that are hosted
And all clients will connect and get the list of hosted games from this server..
To communicate, I made interfaces for request, and respond.
Logon object:
public class LogonObject implements Serializable, MSRequest, MSResponse {
    public String USERNAME;
    public String PASSWORD;
    public void clientWork(MainServerManager client) { // client will do this work..
        // Client work..
    public void serverWork(RCOS server) { // RCOS is the threaded object that contains socket to the client etc..
        // Serverwork..
}So currently, my cast in client looks like this:
        MSResponse objCast = (MSResponse) obj;
        objCast.clientWork(this);Since all the objects im sending, will be of either type of MSRequest or MSRespond, i have not found any problems with it.
But im wondering if there is any better way to do this?
One of the reasons why im wondering, is because i want to split up the project a bit.
At the moment, i got everything in one project (in Netbeans), and got packages like: Client, Client.Network, Client.GUI, Server, Server.Network, Server.DIV, Shared.NetworkObjects, and so on.
Shared contains all the classes that will go back and forth the client and server.
But I want to split them up into different projects. So Server is a project at its own.
So i tried in netbeans, to make one project for Server, one for Client and one for Shared.
This i thought would work out great, but when i tried to add the projects as libraries, I could'nt add both ways.
This is how i would want it to work:
Server (Access to shared)
Client (Access to shared)
Shared (Access to client and server)
Except when I add Shared in Server as a library, I cant add Server as a library in Server, and same for client.
Netbeans gives me the message: Can't add cylic reference.
So that brings me back to the question, is there a better way for me to split it up, or make the shared network files?
Ps: Sorry if its the wrong forum, but it goes under more than one thing, atleast as i figure.
Kind reguards..

Answer 1

Lgeee wrote:
And how would i go about doing that?By making a proper design.
This way, I can easily do what the object itself is made to do, without writing alot of code that checks what kind of object was sendt.
The first way I did this was:
Psudo Code:
Object obj = input.readObject();
String type = obj.getClass().toString();
if (type.contains("logonObject")) {
} else if (type.contains("playerObject")) {
I don't think that's relevant. I don't see where that code uses anything which is specific to the server and to the client. Those class names look like they belong in the server, so that code shouldn't be in a "shared" class. It should be in a "server" class.
As for the issue of having to tell what kind of object was sent, I'm sure there are better ways than just sending an object and then having the receiver inspect the object to see what kind of object it was.