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What Does "OutOfMemoryError" Mean?

Posted on 1997-08-05
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Last Modified: 2010-04-16
Hi, I keep getting "OutOfMemoryError" when I switch between three pages I have that each hold three different applets.  What causes this error?   Thank you
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Question by:dbMan
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katya062697 earned 680 total points
ID: 1224434
OutOfMemoryError means ... that the system is out of memory resources. You have 3 applets per page = 9 applets, all of which might be memory hungry. Now, applets do not give up their resources even when you move to another page, so you will have 9 applets running at the same time ==> out of memory.

Solution: implement init(), start(), stop() and destroy() methods in each of those applets.
These are called by the browser when:
init() - when applet starts first time
start() - when applet is activated (you are back to that page)
stop() - you move off the page
destroy() - browser exits
In the stop method give up all those resources (depending on the resources you are using, this might mean closing files, stopping threads, calling the garbage collector explicitely, etc.), and get them back in the start method. This way you will not have more than 3 applets running at a time. To be even more conservative, you might implement gotFocus() and lostFocus() methods for each applet to allocate and/or give up some resources, as needed.

Hope this helps.
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by:dbMan
ID: 1224435
thanks!
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