## Uses of Class
java.util.OptionalDouble

- Packages that use OptionalDouble
  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.

- - ### Uses of OptionalDouble in java.util

    Methods in java.util that return OptionalDouble
    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.

  - ### Uses of OptionalDouble in java.util.stream

    Methods in java.util.stream that return OptionalDouble
    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.

Submit a bug or feature
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.
Copyright © 1993, 2015, Oracle and/or its affiliates. All rights reserved.