Uses of Interface java.util.function.IntUnaryOperator (Java Platform SE 8 )
Date: 2026-06-25

## Uses of Interface
java.util.function.IntUnaryOperator

- Packages that use IntUnaryOperator
  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.concurrent.atomic | A small toolkit of classes that support lock-free thread-safe programming on single variables.
  java.util.function | Functional interfaces provide target types for lambda expressions and method references.
  java.util.stream | Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

- - ### Uses of IntUnaryOperator in java.util

    Methods in java.util with parameters of type IntUnaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `static void` | Arrays.`parallelSetAll(int[] array, IntUnaryOperator generator)` Set all elements of the specified array, in parallel, using the provided generator function to compute each element.
    `static void` | Arrays.`setAll(int[] array, IntUnaryOperator generator)` Set all elements of the specified array, using the provided generator function to compute each element.

  - ### Uses of IntUnaryOperator in java.util.concurrent.atomic

    Methods in java.util.concurrent.atomic with parameters of type IntUnaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `int` | AtomicIntegerArray.`getAndUpdate(int i, IntUnaryOperator updateFunction)` Atomically updates the element at index `i` with the results of applying the given function, returning the previous value.
    `int` | AtomicInteger.`getAndUpdate(IntUnaryOperator updateFunction)` Atomically updates the current value with the results of applying the given function, returning the previous value.
    `int` | AtomicIntegerFieldUpdater.`getAndUpdate(T obj, IntUnaryOperator updateFunction)` Atomically updates the field of the given object managed by this updater with the results of applying the given function, returning the previous value.
    `int` | AtomicIntegerArray.`updateAndGet(int i, IntUnaryOperator updateFunction)` Atomically updates the element at index `i` with the results of applying the given function, returning the updated value.
    `int` | AtomicInteger.`updateAndGet(IntUnaryOperator updateFunction)` Atomically updates the current value with the results of applying the given function, returning the updated value.
    `int` | AtomicIntegerFieldUpdater.`updateAndGet(T obj, IntUnaryOperator updateFunction)` Atomically updates the field of the given object managed by this updater with the results of applying the given function, returning the updated value.

  - ### Uses of IntUnaryOperator in java.util.function

    Methods in java.util.function that return IntUnaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `default IntUnaryOperator` | IntUnaryOperator.`andThen(IntUnaryOperator after)` Returns a composed operator that first applies this operator to its input, and then applies the `after` operator to the result.
    `default IntUnaryOperator` | IntUnaryOperator.`compose(IntUnaryOperator before)` Returns a composed operator that first applies the `before` operator to its input, and then applies this operator to the result.
    `static IntUnaryOperator` | IntUnaryOperator.`identity()` Returns a unary operator that always returns its input argument.

    Methods in java.util.function with parameters of type IntUnaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `default IntUnaryOperator` | IntUnaryOperator.`andThen(IntUnaryOperator after)` Returns a composed operator that first applies this operator to its input, and then applies the `after` operator to the result.
    `default IntUnaryOperator` | IntUnaryOperator.`compose(IntUnaryOperator before)` Returns a composed operator that first applies the `before` operator to its input, and then applies this operator to the result.

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

    Methods in java.util.stream with parameters of type IntUnaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `static IntStream` | IntStream.`iterate(int seed, IntUnaryOperator f)` Returns an infinite sequential ordered `IntStream` produced by iterative application of a function `f` to an initial element `seed`, producing a `Stream` consisting of `seed`, `f(seed)`, `f(f(seed))`, etc.
    `IntStream` | IntStream.`map(IntUnaryOperator mapper)` Returns a stream consisting of the results of applying the given function to the elements of this stream.

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