## 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.

  - ### 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.