| 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(double[] array, DoubleBinaryOperator
Cumulates, in parallel, each element of the given array in place, using the supplied function.
|
static void |
Arrays.parallelPrefix(double[] array, int fromIndex, int toIndex, DoubleBinaryOperator
Performs
Arrays for the given subrange of the array.
|
| Modifier and Type | Method and Description |
|---|---|
double |
ConcurrentHashMap.reduceEntriesToDouble(long parallelismThreshold, ToDoubleFunction
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.
|
double |
ConcurrentHashMap.reduceKeysToDouble(long parallelismThreshold, ToDoubleFunction
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.
|
double |
ConcurrentHashMap.reduceToDouble(long parallelismThreshold, ToDoubleBiFunction
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.
|
double |
ConcurrentHashMap.reduceValuesToDouble(long parallelismThreshold, ToDoubleFunction
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.
|
| Constructor and Description | |
|---|---|
DoubleAccumulator(DoubleBinaryOperator
Creates a new instance using the given accumulator function and identity element.
|
| Modifier and Type | Method and Description |
|---|---|
OptionalDouble |
DoubleStream.reduce(DoubleBinaryOperator
Performs a
reduction on the elements of this stream, using an
associative accumulation function, and returns an
OptionalDouble describing the reduced value, if any.
|
double |
DoubleStream.reduce(double identity, DoubleBinaryOperator
Performs a
reduction on the elements of this stream, using the provided identity value and an
associative accumulation function, and returns the reduced value.
|