In Java, is it possible to cast to void (not Void)?

Question

Is there anything I can put in X, to make the follow work:

Object o = (void) X;

Answer 1

void is notionally a primitive. (though most would disagree it is even that I suspect) You cannot cast an object to it.

The closest you can come to this is an InvocationHandler can return null for a void method and a void method invoke()ed via reflection will return null.

Answer 2

Java is not C++. In Java, void is not a type, it is a placeholder that means "no return value".