java - visual vm analyze memory leak -

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in visual vm, click on sample->memory, , keep see "windowprincipal" class, instances stay @ 25. right nobody using application. sign of memory leak?

http://www.freeimagehosting.net/image.php?c069df48c2.gif

trying requesting garbage collection multiple times , see graph again. if object instances still there can trace patch of these objects i.e., referencing these objects , can assess if memory leak or legitimate objects cached.


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