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From: Al Sutton <al@funkyandroid.com>
To: Struts Developers List <dev@struts.apache.org>
Date: Wed, 3 Jun 2009 17:14:58 +0200
Subject: RE: use of private final vs. protected
Thread-Topic: use of private final vs. protected
Thread-Index: AcnkXGK7tfMqcqIsQoqd25hJdxHRUQAASFgA
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Back in the dim and distant past I remember final being used to give the JI=
T an optimization hint that whatever's described as final can be inlined as=
 it won't change (note JIT not compiler). It's not a big saving, but in tig=
ht loops and heavily called code it can all add up.

I found http://www.javaperformancetuning.com/tips/final.shtml which expands=
 on it a bit.

Al.

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-----Original Message-----
From: Wes Wannemacher [mailto:wesw@wantii.com]=20
Sent: 03 June 2009 16:02
To: Struts Developers List
Subject: use of private final vs. protected

I am looking at subclassing JakartaMultiPartRequest and almost all of
the members are 'private final', but they are Lists and Maps, so I am
curious what the justification is... I want to subclass and get at the
data, obviously I'd have to change the declarations to protected, but
is final necessary? From what I can see, the only thing it guarantees
is that with each instance of JakartaMultiPartRequest, the Lists or
Maps will point to new instances. I guess what I'm wondering is if
there is an intention to follow a coding standard or something that
I'm missing because I don't see much point for these members to be
private or final (especially since it makes it pretty much impossible
for me to subclass it).

-Wes

--=20
Wes Wannemacher
Author - Struts 2 In Practice
Includes coverage of Struts 2.1, Spring, JPA, JQuery, Sitemesh and more
http://www.manning.com/wannemacher

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