# Uses of Class
java.util.OptionalDouble

Packages that use OptionalDouble
Package
Description
java.util
Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
java.util.stream
Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

## Uses of OptionalDouble in java.util

Methods in java.util that return OptionalDouble
Modifier and Type
Method
Description
`static OptionalDouble`
OptionalDouble.`empty()`
Returns an empty `OptionalDouble` instance.
`static OptionalDouble`
OptionalDouble.`of(double value)`
Returns an `OptionalDouble` describing the given value.

## Uses of OptionalDouble in java.util.stream

Methods in java.util.stream that return OptionalDouble
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`
IntStream.`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`
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.