import java.rmi.*;       // Remote, RemoteException
import javax.rmi.*;      // PortableRemoteObject
import javax.naming.*;   // InitialContext

interface RICase extends Remote {
  String convert( String in ) throws RemoteException;
}

public class JndiCaseServer extends PortableRemoteObject implements RICase {
  public JndiCaseServer() throws RemoteException { }
  public String convert( String in ) {
    System.out.println( "JndiCaseServer.convert() - " + in );
    return in.toUpperCase();
  }
  public static void main( String[] args ) {
    try {
      java.util.Hashtable props = new java.util.Hashtable();
      props.put( Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.cosnaming.CNCtxFactory" );
      // without the next line, received the following error:
      //   javax.naming.CommunicationException: Cannot connect to ORB.
      //     Root exception is org.omg.CORBA.COMM_FAILURE
      props.put( Context.PROVIDER_URL, "iiop://localhost:1100" );
      InitialContext ic = new InitialContext( props );

      ic.rebind( "CaseServer", new JndiCaseServer() );

      System.out.println( "JndiCaseServer bound in JNDI" );
    } catch (NamingException ex ) { ex.printStackTrace();
    } catch (RemoteException ex ) { ex.printStackTrace(); }
} }



import java.rmi.*;       // RemoteException
import javax.rmi.*;      // PortableRemoteObject
import javax.naming.*;   // InitialContext

public class JndiCaseClient {
  public static void main( String[] args ) {
    try {
      java.util.Hashtable props = new java.util.Hashtable();
      props.put( Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.cosnaming.CNCtxFactory" );
      props.put( Context.PROVIDER_URL,            "iiop://123.0.0.456:1100" );
      InitialContext ic = new InitialContext( props );

      Object object  = ic.lookup( "CaseServer" );

      RICase toUpper = (RICase) PortableRemoteObject.narrow( object, RICase.class );
      String one = "Now is _the_ time -";
      System.out.println( "sent ----- " + one );
      System.out.println( "received - " + toUpper.convert( one ) );
      String two = "For **all** good men,";
      System.out.println( "sent ----- " + two );
      System.out.println( "received - " + toUpper.convert( two ) );
    } catch (NamingException ex) { ex.printStackTrace();
    } catch (RemoteException ex) { ex.printStackTrace(); }
} }

// D:\> j2ee -verbose
//
// D:\j2ee\demos> javac JndiCaseServer.java
// D:\j2ee\demos> java  JndiCaseServer
// JndiCaseServer bound in JNDI
// JndiCaseServer.convert() - Now is _the_ time -
// JndiCaseServer.convert() - For **all** good men,
//
// D:\j2ee\demos> javac JndiCaseClient.java
// D:\j2ee\demos> java  JndiCaseClient
// sent ----- Now is _the_ time -
// received - NOW IS _THE_ TIME -
// sent ----- For **all** good men,
// received - FOR **ALL** GOOD MEN,