Re: Why are methods of java.util.concurrent classes final?

Lew <>
Wed, 24 Jun 2009 22:02:48 -0400
Eric Sosman wrote:

    Have we arrived at a circularity? "The methods of
AtomicInteger are final because they are final."

Only if you remove intent. Don't remove intent.

    Perhaps that really *is* the only explanation: The
designers of the class thought `final' would be a good
idea, so they threw it in. It seems to me that the O.P.

It's more than that. The designers chose to prevent overrides as a matter of

has a use case that cries out for non-final methods -- so
maybe we're left with an inherent conflict between "The
class designers were insufficiently imaginative" and "The
O.P. ought not poke his twitchy nose into Things Man Was
Not Meant To Know." In other words, "That's the way it
is, Wednesday, June 24, 2009."

No, we're left with an inherent conflict between the OP's desire to use a
class that was deliberately not designed for his use case, and the fact that
the class he wants to use was deliberately designed not to fit his use case.

It's the designer's choice to limit the use of the API, in this case
AtomicInteger. Sure, that means that there are use cases that won't work with
it; on the up side, the class is safer and easier to guarantee for correct
behavior in the use cases for which it is actually designed.


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