| Package | Description |
|---|---|
| java.util | Contains the collections framework, legacy collection classes, event model,date and time facilities, internationalization, and miscellaneous utilityclasses (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. |
| Modifier and Type | Method | 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. |
| Modifier and Type | Method | 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<? superK> 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<? superK,? superV> 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<? superV> 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. |
| Modifier and Type | Method | 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. |
| Modifier and Type | Method | Description |
|---|---|---|
OptionalInt | IntStream.reduce(IntBinaryOperator op)Performs areduction on the elements of this stream, using anassociative accumulation function, and returns an OptionalInt describing the reduced value, if any. | |
int | IntStream.reduce(int identity,IntBinaryOperator op)Performs areduction on the elements of this stream, using the provided identity value and anassociative accumulation function, and returns the reduced value. |