try
{
    Context initialContext = new InitialContext();
    Object t1 = initialContext.lookup("UserHome");
    UserHome uHome = (UserHome) 
       PortableRemoteObject.narrow(t1, UserHome.class);
    User terry = uHome.create("terry", "foobar");
    terry.ChangePassword("foobar", "barfoo");
}
catch ( UserException e ) { ... }
catch ( CreateException e ) { .. }
catch ( RemoteException e ) { ... }
catch ( NamingException e ) { ... }