Basic Knowledge

No. The main method is the initial code executed in a program and would need to be called even before your initial World object is constructed. The act method cannot be called until after your initial World object is created.

danpost, thanks. I understand that Greenfoot make things much easier for game development. So what is the act method compared with the standard Java code? Thanks, Tomaz

All codes within your class editors (as well as the classes provided by greenfoot (Actor, World, GreenfootImage, etc.) as well as the internal classes greenfoot uses are Java code -- act method and all.

danpost, Thanks. Of course, I know it is based on standard Java. However I have been looking into other Java games and they use a different strategy, meaning they don't have the same ready to use Greenfoot's classes and methods. Anyway I find it different to develop a game in Greenfoot and write the same in Eclipse. Regards, Tomaz

Yes -- it is quite different. Greenfoot takes care of a lot of the nitty gritty stuff for you, so you can concentrate on creating the game play itself. It provides the World class the creates the canvas that can have actors in it; it provides the Greenfoot class for a lot of the user interaction and general purpose control; it provides the GreenfootImage class to make working with images easier; etc. The one big thing it provides is the act methods of the World and Actor classes and the controlling of objects through them (to allow the simulation to run).