Discussions

One way is to make the field 'static'. But you must ensure that you zero the field in your initial world constructor or the value will carry over from game to game. However, if all soldiers are removed from the world when they die, you do not have to keep track of how many are still in the world. You can simply use the following in your World subclass act method: <Code Omitted>

Thanks, I think I'll use this approach. Have you seen my other post about retrieving stacked objects being non-deterministic? I have trying to come up with visualization scenarios for a Stacks using actors and these guys appear to be randomly selected from the list of objects at the same location... I'm wondering what performance improvements are gained by hashing (?) the actors into the set/list vs adding them either FIFO or FILO orders. Any way to specify a different collect class at runtime? Thanks again, Mr Bradley

ah that was it. the sounds folder had a copy in the desktop. the scream was saved into that one. thanks

The detecting of 'space' being down will be triggered multiple times during a single press of the key. You would need a field to track the state of the key to determine the moment that the key goes down:

thank you for the solution

I see. So that means i have to use the Greenfoot.mousePressed(), Greenfoot.mouseClicked(), etc to determine what happened. Thanks for the reply!

That worked like a charm. Thanks

Ok nevermind it works now. I moved the act method up, maybe that was the problem. Thanks danpost & Hippo :)

It means the same thing as: <Code Omitted>provided that 'frame' is not declared as a local variable within the block of code. That is, 'frame' is a predefined instance field. The 'this.' part is implicitly understood from within a non-static method when not explicitly given, It refers to the object created from the class that the method is being executed for (or on). All non-static methods (and constructor blocks) are executed on or for an instance (whether new or not) of the class. Field reference

Works great thanks :)

I don't exactly remember but whatever I did fixed it. It is very possible that I will run across some more bugs with it in the future though.

Thank You

Hmm okay. The computers at my school always create a popup when a function with a return type that isnt void is called. I guess those computers are also running and older version of greenfoot. Thanks for the help, I was very confused.

Okay, Thank you very much.

Well, you could add another 'in the world' at the end of the first sentence if it isn't clear to you. It really wouldn't make much sense if the world keeps a reference to all objects which are created (but not added to world) and doesn't ever remove the reference.