Question

Suppose I have the following java method

protected void onEvent(Object obj) {

    }

The Scala compiler accepts

protected override def onEvent(event: Any)

and

protected override def onEvent(event: Object)

Is there any difference between the two?

Answer 1

There is an article on scala-lang with great diagram (I even put it on the wall). And also need to be mentioned:

If Scala is used in the context of a Java runtime environment, then scala.AnyRef corresponds to java.lang.Object.