Well, yes, what you found is true. An enum can't be made to extend some other class because it is already (implicitly) extending something.
But my impression is that the original question was whether something could extend an enum. (I could be wrong but that's what it looks like to me.) And that's the opposite question to the question you answered.
Joined: Aug 03, 2007
Oh, I got it, they mean subclass an enum... well and Why not?. I don't see that the enum class is final.