Defining and Exporting a Portable Remote Object

1. Define the remote interface. 

 import java.rmi.*;
     
 public interface RObject extends Remote {
   void aMethod() throws RemoteException;
 }
 
2. Define the portable remote object implementation. 
 import java.rmi.*;
 import java.rmi.server.UnicastRemoteObject;
     
 public class RObjectImpl extends UnicastRemoteObject implements RObject {
   public RObjectImpl() throws RemoteException {
     super();
   }
   // All remote methods must throw RemoteException
   public void aMethod() throws RemoteException {
   }
 }
 
3. Compile the remote object implementation. 
 > javac RObject.java RObjectImpl.java
 
4. Generate the skeletons and stubs. 
 Using RMI over IIOP
 > rmic -iiop RObjectImpl
     
 Using RMI over JRMP
 > rmic RObjectImpl
 
5. Create an instance of the remote object and bind it to a name service. 
 import javax.naming.*;
 import java.rmi.RemoteException;
     
 // JRMP: name = "rmi://localhost/RObjectServer";
 // IIOP: name = "iiop://localhost/RObjectServer";
 try {
   RObject robj = new RObjectImpl();
   new InitialContext().bind(name, robj);
 } 
 catch (NamingException e) {
   e.printStackTrace();
 } 
 catch (RemoteException e) {
   e.printStackTrace();
 }