Greenfoot Can I create an actor instance in constructors?

Question

I'm using the Greenfoot program to create a game, but cannot instantiate anything in a constructor. For some reason, nothing is made when I write getWorld().addObject() in the constructor.

I can create objects in the act() method, though.

Answer 1

Since Greenfoot only allows you to add objects from a world object, the other actors you are calling don't exist yet. This means there are no constructors to call getworld() on.