![]() ![]() It might be optimised in later JDK builds, so adding it here just in case.Īssuming List myFinalList = Arrays. It turns out to be slower than forEach() or collect(), and less expressive. There is a third option - using stream().toArray() - see comments under why didn't stream have a toList method. Stateless to avoid unexpected results when doing parallel processing (caused by thread scheduling differences).Īnother benefit with the second approach is if the stream is parallel and the collector is concurrent and unordered then these characteristics can provide useful hints to the reduction operation to do the collecting concurrently.If I understood your question right, youll either need a reference to the object used as key or youll need to type cast your key/values. • Non-interfering, meaning that the function should not alter the source of the stream if it is non-concurrent (e.g. Map
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