Re: final methods and classes

From:
Lew <lew@lewscanon.com>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 12 Oct 2009 13:46:45 -0700 (PDT)
Message-ID:
<0d54bfdd-4724-4209-bb3b-e90af7197cf3@k26g2000vbp.googlegroups.com>
Rze=C5=BAnik wrote:

If you so strongly believe that what you are advocating for is
'recommended practice' then it is not strange that anything I've said


It is not a belief but a verifiable fact. I am advocating a practice,
and it's been recommended by leading authors in the Java world, ergo
it's a recommended practice.

makes no sense to you. Point is that "prohibiting inheritance" is not


Not strange, perhaps, but also not true. What you are saying makes
perfect sense to me, it's only that I don't completely agree with
you. Your mistake is to confuse disagreement with lack of
understanding.

a recommended practice. If you don't design a class to be thread safe
but allow it to be you are in far bigger troubles - do you recommend
putting 'synchronized' everywhere?


No, I don't. I recommend that you either design a class for multi-
threaded use or don't use it in a multi-threaded way. That is cognate
to the discussion here.

Lew wrote:

So let's try again - drop the straw man and circular arguments.


I see you haven't stopped doing that. Stop misstating my point then
arguing against the misstatement.

I am not advocating prohibiting inheritance per se. Stop presenting
that as if I were. It's intellectually dishonest. Let me put that in
simple terms again in case you don't understand it:

I do not advocate prohibiting inheritance. I advocate thinking
carefully about whether a class should be heritable, and either
designing the class to be so or else prohibiting it. There are two
options in what I'm proposing, both based on thinking carefully about
what you will permit. One is to permit inheritance, and if so, design
the class accordingly. The alternative is to prohibit inheritance.
Either/or. Not just one. I am not against inheritance. I am against
the abuse of inheritance.

I do not advocate prohibiting inheritance in any blanket way.

Do you understand that now? Or are you going to misstate my point
again?

Maybe you should break down and actually read the referenced chapters
in /Effective Java/ to get the complete discussion - again, more
cohesively and comprehensively presented than I have done - instead of
attacking points I'm not making and attributing those points to me.

--
Lew
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