Question

I have a class which defines two overloaded methods

public void handle(Void e) 

protected void handle() 

Obviously they are different, especially handle(Void e) is public.

What’s the difference between those two?

How to call the first method? I am using handle(null) – is this correct?

Answer 1

The first function is a function of a single argument, which must be provided and can only validly take the value null. Any value other than null will not compile. The second function doesn’t take any argument and passing null to it would not compile.