If you truly want to learn objects, you should probably learn objects in a system that is truly object oriented. Smalltalk is a good language for that, and the Squeak system
is cross-platform, full of goodies, fun to play with, and has a strong community support (including a couple of Squeak specific books).
Don't bother listening to claims that Java or C++ are "object-oriented". They're hybrid languages like Perl (some objects, some primitives).
-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.
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