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the bolded line didn't work within the code but the line I was pointing out starts with <Code Omitted> and ends with <Code Omitted>.

nvm i found it

Thank you for your answer! Both versions are working well.

Thank you, this works perfectly!

Really? The first two lines are fields -- the others are execution code. And why would you create a World2 object from within a World2 world? Remove lines 3 through 5 here in World2.

Thanks, guys.

That means all methods in the class greenfoot.Greenfoot works only with the class Greenfoot as prefix as danpost explaned! (Example Greenfoot.setWorld(), Greenfoot.getKey() and so on...) Because they are all static. See in the Greenfoot.API All other classes in the greenfoot package are non-static methods except some greenfoot.UserInfo() methods.

Good explanation! I like the concept & idea with the world and actors.

Apparently, you used up memory allotment with too many images. Images, especially large ones or multiple smaller ones, can use up your allotment of memory quickly. Do you create a bunch of actors out of a class using a gif image set?

Try this: <Code Omitted>

Is it your bullet or your player that has health? Why is healthP2 in the class of your bullet? As is, each bullet created will get a playerP2 field assigned a value of 100 and when a bullet hits a player, it decreases it to 99 and the bullet is disposed of (along with its playerP2 field).

My apologies. Not sure how it happened, but I was able to recompile the Trick the Turtle example and it works now. I will look for the termination option when I encounter this problem again.

Provided the actor is actually there: <Code Omitted>You can give more specifically what type of object to look for by replacing "Actor.class" with some subclass of the Actor class.

thanks, will try :D

Oh, but there is and you probably already have them imported -- through the greenfoot package. Refer the the greenfoot classes documentation.