> > Also, I was wondering what the benefit of having the singleton inside a
> > static inner class is. I've seen the pattern before, but I've never
> > understood the benefit of that over just having the singleton
> > XPathFunctionContext as a private static final in XPathFunctionContext
> > itself.
>
> You know, it seemed like a good idea at the time, but now I'm having
> trouble remembering why I did it that way. ;)
>
> Can anyone else justify my actions?
Actually, I remember now.
If you have
public class MyClass
{
private static final MyClass instance = new MyClass();
}
then, whenever MyClass is class-loaded, the singleton will automagically
be instantiated, even if you don't need it. Using the inner class,
I *think* (I could certainly be wrong; Rusty will correct me if I am)
that it prevents the singleton instance from being constructed unless
you actually ask for it.
-bob
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