Enthuware

interface methods can never be declared final.

small correction:

private methods can be final

Not really. The explanation is clearly talking about interface. Did you try it out?

Yes. And it works.

I mean private methods on interfaces can be final

What code did you try? The following doesn't compile:
interface X{
private final void m(){ }
}

I appologize, after running it again I saw that it is not compiling. Must have forgotten to save or something like that.
You might delete this thread