Java™ Platform
Standard Ed. 8

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.nio.file
    Defines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems.
    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.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.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.
    • Uses of Stream in java.io

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

      Methods in java.nio.file that return Stream 
      Modifier and Type Method and 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, 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, int maxDepth, 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.util

      Methods in java.util that return Stream 
      Modifier and Type Method and Description
      default Stream<E> Collection.parallelStream()
      Returns a possibly parallel Stream with this collection as its source.
      default Stream<E> Collection.stream()
      Returns a sequential Stream with this collection as its source.
      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.
    • Uses of Stream in java.util.jar

      Methods in java.util.jar that return Stream 
      Modifier and Type Method and Description
      Stream<JarEntry> JarFile.stream() 
    • Uses of Stream in java.util.regex

      Methods in java.util.regex that return Stream 
      Modifier and Type Method and Description
      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 and Description
      Stream<Double> DoubleStream.boxed()
      Returns a Stream consisting of the elements of this stream, boxed to Double.
      Stream<Long> LongStream.boxed()
      Returns a Stream consisting of the elements of this stream, each boxed to a Long.
      Stream<Integer> IntStream.boxed()
      Returns a Stream consisting of the elements of this stream, each boxed to an Integer.
      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.
      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<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, 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.
      <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... values)
      Returns a sequential ordered stream whose elements are the specified values.
      static <T> Stream<T> Stream.of(T t)
      Returns a sequential Stream containing a single element.
      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(Spliterator<T> spliterator, boolean parallel)
      Creates a new sequential or parallel Stream from a Spliterator.
      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.
      Methods in java.util.stream with parameters of type Stream 
      Modifier and Type Method and 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.
      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 and 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.
    • Uses of Stream in java.util.zip

      Methods in java.util.zip that return Stream 
      Modifier and Type Method and Description
      Stream<? extends ZipEntry> ZipFile.stream()
      Return an ordered Stream over the ZIP file entries.
Java™ Platform
Standard Ed. 8

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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, 2022, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.

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