About Question enthuware.ocpjp.ii.v11.2.3318 :

[tiagofmartinho]

Regarding this question I think the explanation shouldn't say the following: " Further, since it does not return anything, the body part cannot contain an explicit return statement...".

Technically it can. This is legal:

Runnable r = () -> { multiple expressions or none; return; };

[admin]

You are right. Fixed.
thank you for your feedback!