Uses of Interface java.util.function.IntBinaryOperator (Java Platform SE 8 )
Date: 2026-08-19

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

- Packages that use IntBinaryOperator
  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 | Utility classes commonly useful in concurrent programming.
  java.util.concurrent.atomic | A small toolkit of classes that support lock-free thread-safe programming on single variables.
  java.util.stream | Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

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

    Methods in java.util with parameters of type IntBinaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `static void` | Arrays.`parallelPrefix(int[] array, IntBinaryOperator op)` Cumulates, in parallel, each element of the given array in place, using the supplied function.
    `static void` | Arrays.`parallelPrefix(int[] array, int fromIndex, int toIndex, IntBinaryOperator op)` Performs `Arrays.parallelPrefix(int[], IntBinaryOperator)` for the given subrange of the array.

  - ### Uses of IntBinaryOperator in java.util.concurrent

    Methods in java.util.concurrent with parameters of type IntBinaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `int` | ConcurrentHashMap.`reduceEntriesToInt(long parallelismThreshold, ToIntFunction<Map.Entry<K,V>> transformer, int basis, IntBinaryOperator reducer)` Returns the result of accumulating the given transformation of all entries using the given reducer to combine values, and the given basis as an identity value.
    `int` | ConcurrentHashMap.`reduceKeysToInt(long parallelismThreshold, ToIntFunction<? super K> transformer, int basis, IntBinaryOperator reducer)` Returns the result of accumulating the given transformation of all keys using the given reducer to combine values, and the given basis as an identity value.
    `int` | ConcurrentHashMap.`reduceToInt(long parallelismThreshold, ToIntBiFunction<? super K,? super V> transformer, int basis, IntBinaryOperator reducer)` Returns the result of accumulating the given transformation of all (key, value) pairs using the given reducer to combine values, and the given basis as an identity value.
    `int` | ConcurrentHashMap.`reduceValuesToInt(long parallelismThreshold, ToIntFunction<? super V> transformer, int basis, IntBinaryOperator reducer)` Returns the result of accumulating the given transformation of all values using the given reducer to combine values, and the given basis as an identity value.

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

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

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

    Methods in java.util.stream with parameters of type IntBinaryOperator
    Modifier and Type | Method and Description
    --- | ---
    `OptionalInt` | IntStream.`reduce(IntBinaryOperator op)` Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an `OptionalInt` describing the reduced value, if any.
    `int` | IntStream.`reduce(int identity, IntBinaryOperator op)` Performs a reduction on the elements of this stream, using the provided identity value and an associative accumulation function, and returns the reduced value.

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