# 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 <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.