## Uses of Class
java.util.OptionalLong

- Packages that use OptionalLong
  Package | Description
  --- | ---
  java.util |
  java.util.stream | Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

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

    Methods in java.util that return OptionalLong
    Modifier and Type | Method and Description
    --- | ---
    `static OptionalLong` | OptionalLong.`empty()` Returns an empty `OptionalLong` instance.
    `static OptionalLong` | OptionalLong.`of(long value)` Return an `OptionalLong` with the specified value present.

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

    Methods in java.util.stream that return OptionalLong
    Modifier and Type | Method and Description
    --- | ---
    `OptionalLong` | LongStream.`findAny()` Returns an `OptionalLong` describing some element of the stream, or an empty `OptionalLong` if the stream is empty.
    `OptionalLong` | LongStream.`findFirst()` Returns an `OptionalLong` describing the first element of this stream, or an empty `OptionalLong` if the stream is empty.
    `OptionalLong` | LongStream.`max()` Returns an `OptionalLong` describing the maximum element of this stream, or an empty optional if this stream is empty.
    `OptionalLong` | LongStream.`min()` Returns an `OptionalLong` describing the minimum element of this stream, or an empty optional if this stream is empty.
    `OptionalLong` | LongStream.`reduce(LongBinaryOperator op)` Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an `OptionalLong` describing the reduced value, if any.

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