IntStream and collect
jgetino at telefonica.net
Mon May 13 08:43:30 PDT 2013
Yes, I don't care boxing the structure (byte, short, int, BitSet).
But I don't want to box all the ints, there might be the order 10^5 in a
The second boxing level is much more expensive.
De: Brian Goetz [mailto:brian.goetz at oracle.com]
Enviado el: lunes, 13 de mayo de 2013 17:12
CC: lambda-dev at openjdk.java.net
Asunto: Re: IntStream and collect
If we did that, I suspect that about 5 minutes later, you'd find you still
need classes like IntArrayList, IntIntHashMap, etc, to get anywhere. We
prototyped a Collector.OfInt and found there were almost no implementations
to be offered by the JDK. Since the JDK options you've got mean boxing
anyway, a Collector.OfInt would only push the boxing one level down.
On 5/13/2013 6:13 AM, Jose wrote:
> I'm interested on data structures that stores a great number of ints
> (cordinates of polylines) in a efficient way.
> They might include byte, short, int based structures similar to
> nio buffers.
> Some of them store the delta with respect to the previous entry,
> others with respect a common origin.
> Im also intereseted on Bitset based structures, assigning n bits for
> each entry.
> These structures already have a stream() method, and I would like they
> would implement "IntCollector" as well.
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