Questions about RMI-IIOP

Hi all.
my question is about RMI-IIOP.
I have read the following from Java site :
RMI-IIOP provides interoperability with other CORBA objects implemented in various languages - but only if all the remote interfaces are originally defined as Java RMI interfaces.
I'm not sure that I have understand the idea, so correct me please :
1- does RMI-IIOP allows Java remote objects to use C++ remote objects (or vice versa) ?
(what should I say ? Java remote objects, C++ remote objects or Java applications, C++ applications?)
2- "but only if all the remote interfaces are originally defined as Java RMI interfaces."
does this mean that our C++ remote object will implement a Java RMI interface ? how could this be possible ?
3- does RMI-IIOP is exactly the same of CORBA but it sheld Java programmers from IDL and CORBA ?
thanks...

It sounds like you might want to go through a basic Java/Corba tutorial, and then move on up to RMI-IIOP to see the benefits of doing it that way over the old-style. You don't seem to have a grasp of the fundamental services that Corba provides ... distributed objects are just one aspect of it all. I seem to recall a tutorial on Sun, but it's been a while. Do a google -- I'm sure you'll find about a gazillion resources.