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

Packages that use BinaryOperator
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 BinaryOperator in java.util

Methods in java.util with parameters of type BinaryOperator
`static <T> void` Arrays.`parallelPrefix(T[] array, BinaryOperator<T> op)` Cumulates, in parallel, each element of the given array in place, using the supplied function.
`static <T> void` Arrays.`parallelPrefix(T[] array, int fromIndex, int toIndex, BinaryOperator<T> op)` Performs `Arrays.parallelPrefix(Object[], BinaryOperator)` for the given subrange of the array.

### Uses of BinaryOperator in java.util.concurrent.atomic

Methods in java.util.concurrent.atomic with parameters of type BinaryOperator
`E` AtomicReferenceArray.`accumulateAndGet(int i, E x, BinaryOperator<E> 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.
`V` AtomicReferenceFieldUpdater.`accumulateAndGet(T obj, V x, BinaryOperator<V> 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.
`V` AtomicReference.`accumulateAndGet(V x, BinaryOperator<V> accumulatorFunction)` Atomically updates the current value with the results of applying the given function to the current and given values, returning the updated value.
`E` AtomicReferenceArray.`getAndAccumulate(int i, E x, BinaryOperator<E> 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.
`V` AtomicReferenceFieldUpdater.`getAndAccumulate(T obj, V x, BinaryOperator<V> 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.
`V` AtomicReference.`getAndAccumulate(V x, BinaryOperator<V> accumulatorFunction)` Atomically updates the current value with the results of applying the given function to the current and given values, returning the previous value.

### Uses of BinaryOperator in java.util.function

Methods in java.util.function that return BinaryOperator
`static <T> BinaryOperator<T>` BinaryOperator.`maxBy(Comparator<? super T> comparator)` Returns a `BinaryOperator` which returns the greater of two elements according to the specified `Comparator`.
`static <T> BinaryOperator<T>` BinaryOperator.`minBy(Comparator<? super T> comparator)` Returns a `BinaryOperator` which returns the lesser of two elements according to the specified `Comparator`.

### Uses of BinaryOperator in java.util.stream

Methods in java.util.stream that return BinaryOperator
`BinaryOperator<A>` Collector.`combiner()` A function that accepts two partial results and merges them.

Methods in java.util.stream with parameters of type BinaryOperator
`static <T,A,R> Collector<T,A,R>` Collector.`of(Supplier<A> supplier, BiConsumer<A,T> accumulator, BinaryOperator<A> combiner, Function<A,R> finisher, Collector.Characteristics... characteristics)` Returns a new `Collector` described by the given `supplier`, `accumulator`, `combiner`, and `finisher` functions.
`static <T,R> Collector<T,R,R>` Collector.`of(Supplier<R> supplier, BiConsumer<R,T> accumulator, BinaryOperator<R> combiner, Collector.Characteristics... characteristics)` Returns a new `Collector` described by the given `supplier`, `accumulator`, and `combiner` functions.
`Optional<T>` Stream.`reduce(BinaryOperator<T> accumulator)` Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an `Optional` describing the reduced value, if any.
`T` Stream.`reduce(T identity, BinaryOperator<T> accumulator)` Performs a reduction on the elements of this stream, using the provided identity value and an associative accumulation function, and returns the reduced value.
`<U> U` Stream.`reduce(U identity, BiFunction<U,? super T,U> accumulator, BinaryOperator<U> combiner)` Performs a reduction on the elements of this stream, using the provided identity, accumulation and combining functions.
`static <T> Collector<T,?,Optional<T>>` Collectors.`reducing(BinaryOperator<T> op)` Returns a `Collector` which performs a reduction of its input elements under a specified `BinaryOperator`.
`static <T> Collector<T,?,T>` Collectors.`reducing(T identity, BinaryOperator<T> op)` Returns a `Collector` which performs a reduction of its input elements under a specified `BinaryOperator` using the provided identity.
`static <T,U> Collector<T,?,U>` Collectors.`reducing(U identity, Function<? super T,? extends U> mapper, BinaryOperator<U> op)` Returns a `Collector` which performs a reduction of its input elements under a specified mapping function and `BinaryOperator`.
`static <T,K,U> Collector<T,?,ConcurrentMap<K,U>>` Collectors.`toConcurrentMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction)` Returns a concurrent `Collector` that accumulates elements into a `ConcurrentMap` whose keys and values are the result of applying the provided mapping functions to the input elements.

`static <T,K,U,M extends ConcurrentMap<K,U>>
Collector<T,?,M>`

Collectors.`toConcurrentMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction, Supplier<M> mapSupplier)`
Returns a concurrent `Collector` that accumulates elements into a `ConcurrentMap` whose keys and values are the result of applying the provided mapping functions to the input elements.

`static <T,K,U> Collector<T,?,Map<K,U>>` Collectors.`toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction)` Returns a `Collector` that accumulates elements into a `Map` whose keys and values are the result of applying the provided mapping functions to the input elements.
`static <T,K,U,M extends Map<K,U>> Collector<T,?,M>` Collectors.`toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction, Supplier<M> mapSupplier)` Returns a `Collector` that accumulates elements into a `Map` whose keys and values are the result of applying the provided mapping functions to the input elements.