Re: Numpty "synchronized" question with ArrayList
On 10/26/2010 8:05 AM, Richard Maher wrote:
Hi Eric,
"Eric Sosman"<esosman@ieee-dot-org.invalid> wrote in message
news:ia6eqj$rrl$1@news.eternal-september.org...
In my case the ArrayList is used internally, privately, and never
return-ed,
Then how can two different threads get access to it?
Look, unfortunately you'll be seeing a lot more of me in weeks to come as
[...]
Look, I intended no offense. I was just pointing out that the
mere fact that an ArrayList is used in a multi-threaded program does
not in and of itself imply that synchronization is needed. If the
List (or any mutable object) is used by just one thread and never
touched by others, you can just forget about synchronization since
there are no concurrent accesses to guard against. You only need
synchronization if the object is used by two or more threads -- which
is why I raised the question about what "internally, privately, and
never return-ed" means. You may (*may*) be working harder than you
need to.
--
Eric Sosman
esosman@ieee-dot-org.invalid
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