How to implement int in/out params in java

Question

Apologies for asking such a primitive question.

I wrote a function which took one parameter; this parameter was supposed to be an in/out parameter.

After d

Answer 1

Question 2. Calling currentFoo = currentFoo + 1 when working with results in a new object being created and its reference stored in currentFoo. The compiler doesn't complain because it's not invalid Java - it just results in a new object being created, rather than the current one being updated.