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 and 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 and 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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