Rmi running problem

Question

Hi i am working my way through a basic rmi example, here is the code for the server as serverDriver, the interface as SampleServer and server2 as the implementation
of the interface
mport java.rmi.Remote;
import java.rmi.RemoteException;
public interface SampleServer extends Remote{
     public int sum(int a,int b) throws RemoteException;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
public class Server2 extends UnicastRemoteObject implements SampleServer{
     protected Server2() throws RemoteException {
          super();
          // TODO Auto-generated constructor stub
     @Override
     public int sum(int a, int b) throws RemoteException {
          // TODO Auto-generated method stub
          return 0;
public class serverDriver {
     * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          try
               // create the security manager
               System.setSecurityManager(new RMISecurityManager());
               Server2 server = new Server2();
               // put the local instance in the registry
               Naming.rebind("SAMPLE-SERVER",server);
               System.out.println(" the server is waiting ");
          catch(java.net.MalformedURLException me)
               System.out.println("Malformed URL -> " + me.toString());
          catch(RemoteException re)
               System.out.println(" Remote Exception :" + re.toString());
----->
when i run the serverdriver java -Djava.security.policy=policy.all serverDriver
i get
------>
Remote Exception :java.rmi.ServerException: RemoteException occurred in server
thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
java.lang.ClassNotFoundException: SampleServer
------->
all of the class files are in the same directory ( i am using eclipse to compile and running from commandline using jre6 with matching compiler)
is this error beacuse i have to compile with rmic for the interface or is this an "old way" of doing rmi ???
thanks

Answer 1

               // create the security manager
               System.setSecurityManager(new RMISecurityManager());Remove that unless you know you need it.
               // put the local instance in the registryThat won't work. Try Naming.rebind("SAMPLE-SERVER",server);
Naming.rebind("//localhost/SAMPLE-SERVER", server);
Remote Exception :java.rmi.ServerException: RemoteException occurred in server
thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
java.lang.ClassNotFoundException: SampleServerThe RMI Registry doesn't have SampleServer in its CLASSPATH. When you fix that, fix it for the client too.
is this error beacuse i have to compile with rmic for the interfaceNo.