[mishafb]

The lambdas aren't actually lambdas, they are anonymous classes with a single metthod according to the type-inferred interface, and they can't use variables that aren't effectively final.

[gpderetta]

That's just a way to make them work in the existing ecosystem (in C++ lambdas for example are just function objects with overloaded operator()).

The final is to avoid some mistakes, but they are still effectively closures.