Re: ArrayList.Iterator.remove()

Knute Johnson <>
Tue, 30 Jun 2009 15:13:24 -0700
Donkey Hottie wrote:

"Lew" <> wrote in message

I would expect copying to take longer, however, depending
on where one
is in the iteration. Perhaps there's extra machinery in
the iterator
logic to normalize the iterator's position within the

Or are you copying individual elements as you iterate,
skipping over
the "removed" ones? That should be much faster than

Well, after I discovered the slow speed of removal, I rewrote the method
now creates a new List and always just adds the suitable elements and
replaces the List instance.

10% of the original List seem to be removed, and it is 1000 times faster

I'd be really curious to know if using the LinkedList is significantly
faster than ArrayList. If you try it, please post back.



Knute Johnson
email s/nospam/knute2009/

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