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I'm pretty sure it will throw a ConncurrentModificationException before the underlying collection is modified, though I could be wrong.

pkaeding
– pkaeding

2011-01-01 01:46:36 +00:00
Commented Jan 1, 2011 at 1:46
It will attempt to detect concurrent modification and throw an exception. But if you're doing anything with threads, it can't make any promises. Absolutely anything can happen, including breakage.

cHao
– cHao

2011-04-18 14:03:08 +00:00
Commented Apr 18, 2011 at 14:03

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