Re: Q: Atomicity of class loading

Thomas Hawtin <>
Fri, 15 Dec 2006 19:12:50 +0000
Lew wrote:

Thomas Hawtin wrote:

But you might as well make the methods of X static and ditch the
INSTANCE variable.

Unless he's designing X to be reused.

In my experience the word "reuse" is used by the clueless to mean
speculative generalisations. That is, introducing unnecessary complexity
into code because you think perhaps one day it will be useful. It
probably wont, but it will add greatly to maintenance.

I have just read a mighty article by Daniel Savarese, "When Static
Methods and Code Collide",
<>, on
why to prefer instance methods that return static variables over static

Excellent. That appears to be an article on the strategy pattern without
mentioning the strategy pattern. Top strategy for using the strategy
pattern: don't use if it's not called for.

In many applications it won't make much difference, but there are times
when you want the method to be overridable or configurable.

Only then to you use the strategy pattern. Quite possibly with a
strategy that just call the original implementation. The original
implementation with interface can be left untouched, not harming other

methods carry the disadvantages of global variables; instance methods
that return static values mitigate these disadvantages.

Sounds the Monostate pattern. Like the Singleton pattern, only even dafter.

Tom Hawtin

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