| Package | Description | 
|---|---|
| java.util.stream | Classes to support functional-style operations on streams of elements, such
 as map-reduce transformations on collections. | 
| Modifier and Type | Method | Description | 
|---|---|---|
| LongStream | LongStream. flatMap(LongFunction<? extends LongStream> mapper)Returns a stream consisting of the results of replacing each element of
 this stream with the contents of a mapped stream produced by applying
 the provided mapping function to each element. | |
| <U> Stream<U> | LongStream. mapToObj(LongFunction<? extends U> mapper)Returns an object-valued  Streamconsisting of the results of
 applying the given function to the elements of this stream. | 
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