| 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.
|
| 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. |
| 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.
|
| 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.
|
| 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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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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