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To begin with, I am NOT trying to create a subclass of a singleton class. (At least I’m sure I’m not trying to).
I have a class ClassA that is abstract.
I have two classes, ClassA1 and ClassA2 that extend ClassA.
I want ClassA1 and ClassA2 to be singleton classes. I could just write the code in each one to do so but I would prefer to write the code once in ClassA and reuse it in all of it’s sub-classes. Is there a way to do this?
Probably not – the singleton pattern requires static methods/fields, which would be shared by
ClassAand all its subclasses if defined in one place.