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OMG MR COHEN!!!! YES! I FIND THAT ONE POTENTIAL REASON MY PROGRAM CRASH IS BECAUSE I DO SCALING 10000 TIMES ON THE CONSTRUCTER. PNG SCALING DOES NOT WORK WELL ON PREVIEW LOL SO PROBABLY I NEED TO FIND ANOTHER TOOL! OMG WHY YOU ARE ON GREENFOOT WEBSITE ALL THE TIME HAHAHAHAHAH!

Oke, thank you. @Danpost

In KogelView class update method, you would need to check with: <Code Omitted>and then remove the KogelView object from its controller to effectively remove the bullet it controls.

Sorry I hastily chopped two parts together. Thanks for the correction. I'm curious if this will solve OP's problem

Best to scale images with an image app like Paint. Image manipulation during program execution can increase the possibility of lag (or increase the present lag). Reducing the entire size of your scenario would probably help as far as lag is concerned Think of it -- cutting all length in half would reduce image file sizes to one fourth (1/2 by 1/2). Removing image files not required for the scenario would help load time.

You need to upload it again (update it) -- this time, just make sure to check the "Publish source code" box.

Might want to also restrict the key returned to being character values of at least 32 (to printable characters). Line 10 in Hippo's code could be: <Code Omitted>

For what purpose? What are you going to do with the list? I suspect you will iterate through the list either to do something with all the actors or with specific types within the list, in which case: <Code Omitted>

Image and sound files are usually what makes up the majority of the size of large scenarios. The number of classes and number of dependencies between them can influence load time; but, again, image and sound files are a much greater influence.

I hear you. The reason i ask is because i am a school teacher and on of my students told me about this problem and when i looked at it i found out that most of the time it's ok and only sometimes this problem appeared in the game and i didn't know how to explain it (i still don't) because i'm not java expert. Anyway thanks

Thank you very much. It worked perfectly.

Thanks Danpost. It will take me awhile on weekends...

Thanks so much for all the help today man. Really helped me with my school project.

Thank you!