Why does Scala starts from an object's main method instead of a class's static main method?

Question

In Java, a program starts from a class's static main method. But in Scala, it starts from a object's main method.

Does anyone know the rationality of designing like this?

Scala also provide a trait called App, which can replace main method if an object extends this trait. Does anyone have ideas about which one (App or main) is the preferred way?

Thanks!

Answer 1

Scala has singleton objects instead of java static members. So main method of object is analogue of java static main method.