| Package | Description | 
|---|---|
| java.util | Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array). | 
| java.util.stream | Classes to support functional-style operations on streams of elements, such
 as map-reduce transformations on collections. | 
| Modifier and Type | Method and Description | 
|---|---|
| static <T> void | Arrays. parallelSetAll(T[] array,
              IntFunction<? extends T> generator)Set all elements of the specified array, in parallel, using the
 provided generator function to compute each element. | 
| static <T> void | Arrays. setAll(T[] array,
      IntFunction<? extends T> generator)Set all elements of the specified array, using the provided
 generator function to compute each element. | 
| Modifier and Type | Method and Description | 
|---|---|
| IntStream | IntStream. flatMap(IntFunction<? extends IntStream> 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> | IntStream. mapToObj(IntFunction<? extends U> mapper)Returns an object-valued  Streamconsisting of the results of
 applying the given function to the elements of this stream. | 
| <A> A[] | Stream. toArray(IntFunction<A[]> generator)Returns an array containing the elements of this stream, using the
 provided  generatorfunction to allocate the returned array, as
 well as any additional arrays that might be required for a partitioned
 execution or for resizing. | 
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