[Ikopar]

I try to implement a singleton pattern: Therefore I have an abstract class with a static field "singelton" and an appropriate getter. Does updating of "singleton" work without a real instance of the class (as it is abstract)?

[Jackil]

Ikopar, wtf

[froomzer]

Ikopar, http://www.javapractices.com/Topic46.cjp

[montanarry]

Yes and no. You can access the object via the abstract interface, but you can't construct an instance without a concrete class.
You need a concrete class, that is.

[Klimapol]

Ikopar, singleton (mutable objects) suck. Immutable singleton; use enum.

[Ikopar]

montanarry, I implemented the concrete class as private inner class in the abstract class.

[montanarry]

Ikopar, and the nice thing about know something is you can always be wrong.
Yu can do what you asked. Be careful.
Ikopar, The short answer to your question was yes, not no.

[Klimapol]

Ikopar, whatever you do with a singleton boils down to one or two cases.
Is it mutable? Yes or no?

[Ikopar]

Klimapol, nope it isn't by the interface provided.

[Jackil]

Mutable singletons are asking for trouble