# Uses of Interface
java.util.function.IntFunction

Packages that use IntFunction
Package
Description
java.util
Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
java.util.stream
Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

- ## Uses of IntFunction in java.util

  Methods in java.util with parameters of type IntFunction
  Modifier and Type
  Method
  Description
  `static <E> List<E>`
  List.`ofLazy(int size, IntFunction<? extends E> computingFunction)`
  Preview.
  Returns a new lazily computed list of the provided `size`.
  `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.
  `default <T> T[]`
  Collection.`toArray(IntFunction<T[]> generator)`
  Returns an array containing all of the elements in this collection, using the provided `generator` function to allocate the returned array.

- ## Uses of IntFunction in java.util.stream

  Methods in java.util.stream with parameters of type IntFunction
  Modifier and Type
  Method
  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 `Stream` consisting 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 `generator` function to allocate the returned array, as well as any additional arrays that might be required for a partitioned execution or for resizing.