# Uses of Interface
java.util.stream.Stream

Packages that use Stream
Package
Description
java.io
Provides for system input and output through data streams, serialization and the file system.
java.lang
Provides classes that are fundamental to the design of the Java programming language.
java.lang.module
Classes to support module descriptors and creating configurations of modules by means of resolution and service binding.
java.net
Provides the classes for implementing networking applications.
java.net.http
HTTP Client and WebSocket APIs
java.net.spi
Service-provider classes for the `java.net` package.
java.nio.file
Defines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems.
java.security
Provides the classes and interfaces for the security framework.
java.sql
Provides the API for accessing and processing data stored in a data source (usually a relational database) using the Java programming language.
java.time
The main API for dates, times, instants, and durations.
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.jar
Provides classes for reading and writing the JAR (Java ARchive) file format, which is based on the standard ZIP file format with an optional manifest file.
java.util.random
This package contains classes and interfaces that support a generic API for random number generation.
java.util.regex
Classes for matching character sequences against patterns specified by regular expressions.
java.util.stream
Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.
java.util.zip
Provides classes for reading and writing the standard ZIP and GZIP file formats.
javax.xml.catalog
Provides the classes for implementing XML Catalogs OASIS Standard V1.1, 7 October 2005.
jdk.incubator.foreign
Classes to support low-level and efficient foreign memory/function access, directly from Java.
jdk.jshell
Provides interfaces for creating tools, such as a Read-Eval-Print Loop (REPL), which interactively evaluate "snippets" of Java programming language code.

## Uses of Stream in java.io

Methods in java.io that return Stream
Modifier and Type
Method
Description
`Stream<String>`
BufferedReader.`lines()`
Returns a `Stream`, the elements of which are lines read from this `BufferedReader`.

## Uses of Stream in java.lang

Methods in java.lang that return Stream
Modifier and Type
Method
Description
`static Stream<ProcessHandle>`
ProcessHandle.`allProcesses()`
Returns a snapshot of all processes visible to the current process.
`Stream<ProcessHandle>`
Process.`children()`
Returns a snapshot of the direct children of the process.
`Stream<ProcessHandle>`
ProcessHandle.`children()`
Returns a snapshot of the current direct children of the process.
`Stream<ProcessHandle>`
Process.`descendants()`
Returns a snapshot of the descendants of the process.
`Stream<ProcessHandle>`
ProcessHandle.`descendants()`
Returns a snapshot of the descendants of the process.
`Stream<String>`
String.`lines()`
Returns a stream of lines extracted from this string, separated by line terminators.
`Stream<URL>`
ClassLoader.`resources(String name)`
Returns a stream whose elements are the URLs of all the resources with the given name.
Method parameters in java.lang with type arguments of type Stream
Modifier and Type
Method
Description
`<T> T`
StackWalker.`walk(Function<? super Stream<StackWalker.StackFrame>,? extends T> function)`
Applies the given function to the stream of `StackFrame`s for the current thread, traversing from the top frame of the stack, which is the method calling this `walk` method.

## Uses of Stream in java.lang.module

Methods in java.lang.module that return Stream
Modifier and Type
Method
Description
`Stream<String>`
ModuleReader.`list()`
Lists the contents of the module, returning a stream of elements that are the names of all resources in the module.

## Uses of Stream in java.net

Methods in java.net that return Stream
Modifier and Type
Method
Description
`Stream<InetAddress>`
NetworkInterface.`inetAddresses()`
Get a Stream of all or a subset of the InetAddresses bound to this network interface.
`static Stream<NetworkInterface>`
NetworkInterface.`networkInterfaces()`
Returns a `Stream` of all the interfaces on this machine.
`Stream<NetworkInterface>`
NetworkInterface.`subInterfaces()`
Get a Stream of all subinterfaces (also known as virtual interfaces) attached to this network interface.

## Uses of Stream in java.net.http

Methods in java.net.http that return types with arguments of type Stream
Modifier and Type
Method
Description
`static HttpResponse.BodyHandler<Stream<String>>`
HttpResponse.BodyHandlers.`ofLines()`
Returns a `BodyHandler<Stream<String>>` that returns a `BodySubscriber``<Stream<String>>` obtained from `BodySubscribers.ofLines(charset)`.
`static HttpResponse.BodySubscriber<Stream<String>>`
HttpResponse.BodySubscribers.`ofLines(Charset charset)`
Returns a `BodySubscriber` which streams the response body as a `Stream``<String>`, where each string in the stream corresponds to a line as defined by `BufferedReader.lines()`.

## Uses of Stream in java.net.spi

Methods in java.net.spi that return Stream
Modifier and Type
Method
Description
`Stream<InetAddress>`
InetAddressResolver.`lookupByName(String host, InetAddressResolver.LookupPolicy lookupPolicy)`
Given the name of a host, returns a stream of IP addresses of the requested address family associated with a provided hostname.

## Uses of Stream in java.nio.file

Methods in java.nio.file that return Stream
Modifier and Type
Method
Description
`static Stream<Path>`
Files.`find(Path start, int maxDepth, BiPredicate<Path,BasicFileAttributes> matcher, FileVisitOption... options)`
Return a `Stream` that is lazily populated with `Path` by searching for files in a file tree rooted at a given starting file.
`static Stream<String>`
Files.`lines(Path path)`
Read all lines from a file as a `Stream`.
`static Stream<String>`
Files.`lines(Path path, Charset cs)`
Read all lines from a file as a `Stream`.
`static Stream<Path>`
Files.`list(Path dir)`
Return a lazily populated `Stream`, the elements of which are the entries in the directory.
`static Stream<Path>`
Files.`walk(Path start, int maxDepth, FileVisitOption... options)`
Return a `Stream` that is lazily populated with `Path` by walking the file tree rooted at a given starting file.
`static Stream<Path>`
Files.`walk(Path start, FileVisitOption... options)`
Return a `Stream` that is lazily populated with `Path` by walking the file tree rooted at a given starting file.

## Uses of Stream in java.security

Methods in java.security that return Stream
Modifier and Type
Method
Description
`Stream<Permission>`
PermissionCollection.`elementsAsStream()`
Returns a stream of all the Permission objects in the collection.

## Uses of Stream in java.sql

Methods in java.sql that return Stream
Modifier and Type
Method
Description
`static Stream<Driver>`
DriverManager.`drivers()`
Retrieves a Stream with all of the currently loaded JDBC drivers to which the current caller has access.

## Uses of Stream in java.time

Methods in java.time that return Stream
Modifier and Type
Method
Description
`Stream<LocalDate>`
LocalDate.`datesUntil(LocalDate endExclusive)`
Returns a sequential ordered stream of dates.
`Stream<LocalDate>`
LocalDate.`datesUntil(LocalDate endExclusive, Period step)`
Returns a sequential ordered stream of dates by given incremental step.

## Uses of Stream in java.util

Methods in java.util that return Stream
Modifier and Type
Method
Description
`Stream<MatchResult>`
Scanner.`findAll(String patString)`
Returns a stream of match results that match the provided pattern string.
`Stream<MatchResult>`
Scanner.`findAll(Pattern pattern)`
Returns a stream of match results from this scanner.
`default Stream<E>`
Collection.`parallelStream()`
Returns a possibly parallel `Stream` with this collection as its source.
`Stream<RandomGenerator.SplittableGenerator>`
SplittableRandom.`splits()`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.
`Stream<RandomGenerator.SplittableGenerator>`
SplittableRandom.`splits(long streamSize)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.
`Stream<RandomGenerator.SplittableGenerator>`
SplittableRandom.`splits(long streamSize, RandomGenerator.SplittableGenerator source)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.
`Stream<RandomGenerator.SplittableGenerator>`
SplittableRandom.`splits(RandomGenerator.SplittableGenerator source)`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.
`static <T> Stream<T>`
Arrays.`stream(T[] array)`
Returns a sequential `Stream` with the specified array as its source.
`static <T> Stream<T>`
Arrays.`stream(T[] array, int startInclusive, int endExclusive)`
Returns a sequential `Stream` with the specified range of the specified array as its source.
`default Stream<E>`
Collection.`stream()`
Returns a sequential `Stream` with this collection as its source.
`Stream<T>`
Optional.`stream()`
If a value is present, returns a sequential `Stream` containing only that value, otherwise returns an empty `Stream`.
`Stream<ServiceLoader.Provider<S>>`
ServiceLoader.`stream()`
Returns a stream to lazily load available providers of this loader's service.
`Stream<String>`
Scanner.`tokens()`
Returns a stream of delimiter-separated tokens from this scanner.

## Uses of Stream in java.util.jar

Methods in java.util.jar that return Stream
Modifier and Type
Method
Description
`Stream<JarEntry>`
JarFile.`stream()`
Returns an ordered `Stream` over the jar file entries.
`Stream<JarEntry>`
JarFile.`versionedStream()`
Returns a `Stream` of the versioned jar file entries.

## Uses of Stream in java.util.random

Methods in java.util.random that return Stream
Modifier and Type
Method
Description
`static Stream<RandomGeneratorFactory<RandomGenerator>>`
RandomGeneratorFactory.`all()`
Returns a non-empty stream of available `RandomGeneratorFactory(s)`.
`default Stream<RandomGenerator.ArbitrarilyJumpableGenerator>`
RandomGenerator.ArbitrarilyJumpableGenerator.`jumps(double distance)`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator.ArbitrarilyJumpableGenerator` interface, produced by jumping copies of this generator by different integer multiples of the specified jump distance.
`default Stream<RandomGenerator.ArbitrarilyJumpableGenerator>`
RandomGenerator.ArbitrarilyJumpableGenerator.`jumps(long streamSize, double distance)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator.ArbitrarilyJumpableGenerator` interface, produced by jumping copies of this generator by different integer multiples of the specified jump distance.
`default Stream<RandomGenerator>`
RandomGenerator.JumpableGenerator.`jumps()`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator` interface.
`default Stream<RandomGenerator>`
RandomGenerator.JumpableGenerator.`jumps(long streamSize)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator` interface.
`default Stream<RandomGenerator.JumpableGenerator>`
RandomGenerator.LeapableGenerator.`leaps()`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator.JumpableGenerator` interface.
`default Stream<RandomGenerator.JumpableGenerator>`
RandomGenerator.LeapableGenerator.`leaps(long streamSize)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator.JumpableGenerator` interface.
`default Stream<RandomGenerator>`
RandomGenerator.JumpableGenerator.`rngs()`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator` interface.
`default Stream<RandomGenerator>`
RandomGenerator.JumpableGenerator.`rngs(long streamSize)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator` interface.
`default Stream<RandomGenerator>`
RandomGenerator.SplittableGenerator.`rngs()`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator` interface.
`default Stream<RandomGenerator>`
RandomGenerator.SplittableGenerator.`rngs(long streamSize)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator` interface.
`Stream<RandomGenerator>`
RandomGenerator.StreamableGenerator.`rngs()`
Returns an effectively unlimited stream of objects, each of which implements the `RandomGenerator` interface.
`default Stream<RandomGenerator>`
RandomGenerator.StreamableGenerator.`rngs(long streamSize)`
Returns an effectively unlimited stream of objects, each of which implements the `RandomGenerator` interface.
`default Stream<RandomGenerator.SplittableGenerator>`
RandomGenerator.SplittableGenerator.`splits()`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.
`Stream<RandomGenerator.SplittableGenerator>`
RandomGenerator.SplittableGenerator.`splits(long streamSize)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.
`Stream<RandomGenerator.SplittableGenerator>`
RandomGenerator.SplittableGenerator.`splits(long streamSize, RandomGenerator.SplittableGenerator source)`
Returns a stream producing the given `streamSize` number of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.
`Stream<RandomGenerator.SplittableGenerator>`
RandomGenerator.SplittableGenerator.`splits(RandomGenerator.SplittableGenerator source)`
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the `RandomGenerator.SplittableGenerator` interface.

## Uses of Stream in java.util.regex

Methods in java.util.regex that return Stream
Modifier and Type
Method
Description
`Stream<MatchResult>`
Matcher.`results()`
Returns a stream of match results for each subsequence of the input sequence that matches the pattern.
`Stream<String>`
Pattern.`splitAsStream(CharSequence input)`
Creates a stream from the given input sequence around matches of this pattern.

## Uses of Stream in java.util.stream

Methods in java.util.stream that return Stream
Modifier and Type
Method
Description
`Stream<Double>`
DoubleStream.`boxed()`
Returns a `Stream` consisting of the elements of this stream, boxed to `Double`.
`Stream<Integer>`
IntStream.`boxed()`
Returns a `Stream` consisting of the elements of this stream, each boxed to an `Integer`.
`Stream<Long>`
LongStream.`boxed()`
Returns a `Stream` consisting of the elements of this stream, each boxed to a `Long`.
`Stream<T>`
Stream.Builder.`build()`
Builds the stream, transitioning this builder to the built state.
`static <T> Stream<T>`
Stream.`concat(Stream<? extends T> a, Stream<? extends T> b)`
Creates a lazily concatenated stream whose elements are all the elements of the first stream followed by all the elements of the second stream.
`Stream<T>`
Stream.`distinct()`
Returns a stream consisting of the distinct elements (according to `Object.equals(Object)`) of this stream.
`default Stream<T>`
Stream.`dropWhile(Predicate<? super T> predicate)`
Returns, if this stream is ordered, a stream consisting of the remaining elements of this stream after dropping the longest prefix of elements that match the given predicate.
`static <T> Stream<T>`
Stream.`empty()`
Returns an empty sequential `Stream`.
`Stream<T>`
Stream.`filter(Predicate<? super T> predicate)`
Returns a stream consisting of the elements of this stream that match the given predicate.
`<R> Stream<R>`
Stream.`flatMap(Function<? super T,? extends Stream<? extends R>> mapper)`
Returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
`static <T> Stream<T>`
Stream.`generate(Supplier<? extends T> s)`
Returns an infinite sequential unordered stream where each element is generated by the provided `Supplier`.
`static <T> Stream<T>`
Stream.`iterate(T seed, Predicate<? super T> hasNext, UnaryOperator<T> next)`
Returns a sequential ordered `Stream` produced by iterative application of the given `next` function to an initial element, conditioned on satisfying the given `hasNext` predicate.
`static <T> Stream<T>`
Stream.`iterate(T seed, UnaryOperator<T> f)`
Returns an infinite sequential ordered `Stream` produced by iterative application of a function `f` to an initial element `seed`, producing a `Stream` consisting of `seed`, `f(seed)`, `f(f(seed))`, etc.
`Stream<T>`
Stream.`limit(long maxSize)`
Returns a stream consisting of the elements of this stream, truncated to be no longer than `maxSize` in length.
`<R> Stream<R>`
Stream.`map(Function<? super T,? extends R> mapper)`
Returns a stream consisting of the results of applying the given function to the elements of this stream.
`default <R> Stream<R>`
Stream.`mapMulti(BiConsumer<? super T,? super Consumer<R>> mapper)`
Returns a stream consisting of the results of replacing each element of this stream with multiple elements, specifically zero or more elements.
`<U> Stream<U>`
DoubleStream.`mapToObj(DoubleFunction<? extends U> mapper)`
Returns an object-valued `Stream` consisting of the results of applying the given function to the elements of this stream.
`<U> Stream<U>`
IntStream.`mapToObj(IntFunction<? extends U> mapper)`
Returns an object-valued `Stream` consisting of the results of applying the given function to the elements of this stream.
`<U> Stream<U>`
LongStream.`mapToObj(LongFunction<? extends U> mapper)`
Returns an object-valued `Stream` consisting of the results of applying the given function to the elements of this stream.
`static <T> Stream<T>`
Stream.`of(T t)`
Returns a sequential `Stream` containing a single element.
`static <T> Stream<T>`
Stream.`of(T... values)`
Returns a sequential ordered stream whose elements are the specified values.
`static <T> Stream<T>`
Stream.`ofNullable(T t)`
Returns a sequential `Stream` containing a single element, if non-null, otherwise returns an empty `Stream`.
`Stream<T>`
Stream.`peek(Consumer<? super T> action)`
Returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as elements are consumed from the resulting stream.
`Stream<T>`
Stream.`skip(long n)`
Returns a stream consisting of the remaining elements of this stream after discarding the first `n` elements of the stream.
`Stream<T>`
Stream.`sorted()`
Returns a stream consisting of the elements of this stream, sorted according to natural order.
`Stream<T>`
Stream.`sorted(Comparator<? super T> comparator)`
Returns a stream consisting of the elements of this stream, sorted according to the provided `Comparator`.
`static <T> Stream<T>`
StreamSupport.`stream(Supplier<? extends Spliterator<T>> supplier, int characteristics, boolean parallel)`
Creates a new sequential or parallel `Stream` from a `Supplier` of `Spliterator`.
`static <T> Stream<T>`
StreamSupport.`stream(Spliterator<T> spliterator, boolean parallel)`
Creates a new sequential or parallel `Stream` from a `Spliterator`.
`default Stream<T>`
Stream.`takeWhile(Predicate<? super T> predicate)`
Returns, if this stream is ordered, a stream consisting of the longest prefix of elements taken from this stream that match the given predicate.
Methods in java.util.stream with parameters of type Stream
Modifier and Type
Method
Description
`static <T> Stream<T>`
Stream.`concat(Stream<? extends T> a, Stream<? extends T> b)`
Creates a lazily concatenated stream whose elements are all the elements of the first stream followed by all the elements of the second stream.
Method parameters in java.util.stream with type arguments of type Stream
Modifier and Type
Method
Description
`<R> Stream<R>`
Stream.`flatMap(Function<? super T,? extends Stream<? extends R>> mapper)`
Returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
`static <T, U, A, R> Collector<T,?,R>`
Collectors.`flatMapping(Function<? super T,? extends Stream<? extends U>> mapper, Collector<? super U,A,R> downstream)`
Adapts a `Collector` accepting elements of type `U` to one accepting elements of type `T` by applying a flat mapping function to each input element before accumulation.

## Uses of Stream in java.util.zip

Methods in java.util.zip that return Stream
Modifier and Type
Method
Description
`Stream<? extends ZipEntry>`
ZipFile.`stream()`
Returns an ordered `Stream` over the ZIP file entries.

## Uses of Stream in javax.xml.catalog

Methods in javax.xml.catalog that return Stream
Modifier and Type
Method
Description
`Stream<Catalog>`
Catalog.`catalogs()`
Returns a sequential Stream of alternative Catalogs specified using the `nextCatalog` entries in the current catalog, and as the input of catalog files excluding the current catalog (that is, the first in the input list) when the Catalog object is created by the `CatalogManager`.

## Uses of Stream in jdk.incubator.foreign

Methods in jdk.incubator.foreign that return Stream
Modifier and Type
Method
Description
`Stream<MemorySegment>`
MemorySegment.`elements(MemoryLayout elementLayout)`
Returns a sequential `Stream` over disjoint slices (whose size matches that of the specified layout) in this segment.

## Uses of Stream in jdk.jshell

Methods in jdk.jshell that return Stream
Modifier and Type
Method
Description
`Stream<Diag>`
JShell.`diagnostics(Snippet snippet)`
Return the diagnostics of the most recent evaluation of the snippet.
`Stream<ImportSnippet>`
JShell.`imports()`
Returns the active import snippets.
`Stream<MethodSnippet>`
JShell.`methods()`
Returns the active method snippets.
`Stream<Snippet>`
JShell.`snippets()`
Return all snippets.
`Stream<TypeDeclSnippet>`
JShell.`types()`
Returns the active type declaration (class, interface, annotation type, and enum) snippets.
`Stream<String>`
JShell.`unresolvedDependencies(DeclarationSnippet snippet)`
For `RECOVERABLE_DEFINED` or `RECOVERABLE_NOT_DEFINED` declarations, the names of current unresolved dependencies for the snippet.
`Stream<VarSnippet>`
JShell.`variables()`
Returns the active variable snippets.