| 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.stream |
Classes to support functional-style operations on streams of elements, such
as map-reduce transformations on collections.
|
| Modifier and Type | Method | Description |
|---|---|---|
static OptionalDouble |
OptionalDouble.empty ()
Returns an empty
OptionalDouble instance. |
|
static OptionalDouble |
OptionalDouble.of (double value)
Return an
OptionalDouble with the specified value present. |
| Modifier and Type | Method | Description |
|---|---|---|
OptionalDouble |
DoubleStream.average ()
Returns an
OptionalDouble describing the arithmetic
mean of elements of this stream, or an empty optional if this
stream is empty. |
|
OptionalDouble |
LongStream.average ()
Returns an
OptionalDouble describing the arithmetic mean of elements of
this stream, or an empty optional if this stream is empty. |
|
OptionalDouble |
IntStream.average ()
Returns an
OptionalDouble describing the arithmetic mean of elements of
this stream, or an empty optional if this stream is empty. |
|
OptionalDouble |
DoubleStream.findAny ()
Returns an
OptionalDouble describing some element of the stream,
or an empty OptionalDouble if the stream is empty. |
|
OptionalDouble |
DoubleStream.findFirst ()
Returns an
OptionalDouble describing the first element of this
stream, or an empty OptionalDouble if the stream is empty. |
|
OptionalDouble |
DoubleStream.max ()
Returns an
OptionalDouble describing the maximum element of this
stream, or an empty OptionalDouble if this stream is empty. |
|
OptionalDouble |
DoubleStream.min ()
Returns an
OptionalDouble describing the minimum element of this
stream, or an empty OptionalDouble if this stream is empty. |
|
OptionalDouble |
DoubleStream.reduce (DoubleBinaryOperator op)
Performs a reduction on the
elements of this stream, using an
associative accumulation
function, and returns an
OptionalDouble describing the reduced
value, if any. |
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