OO and modules ( was Which book for ADA beginner ?)

["Hans-Olof Danielsson" <Hans-Olof.Danielsson@swipnet.se>]

Andrzej Lewandowski wrote:

>......
> object orientation and modules are in principle orthoogonal concepts, and
> that BOTH and SEPARATE are required to build well structured OO programs.

That�s interesting. Does that mean that adding, modifying or deleting an
OO-object from a software system doesn�t effect the architecture of it as
the architecture deals with components ( modules ) and their relationship?

> C++, Eiffel, Smalltalk ond others are using classes for both purposes: OO
and
> encapsulation (say, modularization).

> Ada95 and Oberon are two (well, maybe not
> the ONLY two...) languages that separate these two notions.
>......

and are therefore more expressive at the architectual level compared to the
first group languages?

And to which group does Java with its interface and package constructs
belong, the first or the second and why?

HOD