| 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 OptionalLong | OptionalLong. empty()Returns an empty  OptionalLonginstance. | 
| static OptionalLong | OptionalLong. of(long value)Return an  OptionalLongwith the specified value present. | 
| Modifier and Type | Method and Description | 
|---|---|
| OptionalLong | LongStream. findAny()Returns an  OptionalLongdescribing some element of the stream, or
 an emptyOptionalLongif the stream is empty. | 
| OptionalLong | LongStream. findFirst()Returns an  OptionalLongdescribing the first element of this
 stream, or an emptyOptionalLongif the stream is empty. | 
| OptionalLong | LongStream. max()Returns an  OptionalLongdescribing the maximum element of this
 stream, or an empty optional if this stream is empty. | 
| OptionalLong | LongStream. min()Returns an  OptionalLongdescribing 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  OptionalLongdescribing the reduced value,
 if any. | 
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