Can Java lambdas reuse their named arguments to remove type declarations?

Question

From what I have seen so far the usual way of scoring in java is by using lambda expressions. I often see Try it online used for it. My actual question comes now:

Can you reuse the name of a named lambda to define a variable, thus allowing you to remove the var? For example, normally you'd do:

f -> {var s = ""; /* rest of the code */}

Are you allowed to make f a String to save a few characters? It'd then look like this:

f -> {f = ""; /* rest of the code */}

Answer 1

Writing f->{/*code*/} is absolutely alright, as agreed upon in the question Dude coinheringaahing linked.

However, I would say that the second shouldn't be allowed because although you're not using the value of f, you're taking advantage of its type. In my opinion, the input f shouldn't be mentioned anywhere in your lambda other than the parameter list because it's really not even supposed to exist - it's just meant to save a byte over ()->{...}.