# 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.