| 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. | 
| Modifier and Type | Method and Description | 
|---|---|
| Stream<String> | BufferedReader. lines()Returns a  Stream, the elements of which are lines read from
 thisBufferedReader. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Stream<Path> | Files. find(Path start,
    int maxDepth,
    BiPredicate<Path,BasicFileAttributes> matcher,
    FileVisitOption... options)Return a  Streamthat is lazily populated withPathby 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  Streamthat is lazily populated withPathby walking the file tree rooted at a given starting file. | 
| static Stream<Path> | Files. walk(Path start,
    int maxDepth,
    FileVisitOption... options)Return a  Streamthat is lazily populated withPathby walking the file tree rooted at a given starting file. | 
| Modifier and Type | Method and Description | 
|---|---|
| default Stream<E> | Collection. parallelStream()Returns a possibly parallel  Streamwith this collection as its
 source. | 
| default Stream<E> | Collection. stream()Returns a sequential  Streamwith this collection as its source. | 
| static <T> Stream<T> | Arrays. stream(T[] array)Returns a sequential  Streamwith the specified array as its
 source. | 
| static <T> Stream<T> | Arrays. stream(T[] array,
      int startInclusive,
      int endExclusive)Returns a sequential  Streamwith the specified range of the
 specified array as its source. | 
| Modifier and Type | Method and Description | 
|---|---|
| Stream<JarEntry> | JarFile. 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. | 
| Modifier and Type | Method and Description | 
|---|---|
| Stream<Long> | LongStream. boxed()Returns a  Streamconsisting of the elements of this stream,
 each boxed to aLong. | 
| Stream<Integer> | IntStream. boxed()Returns a  Streamconsisting of the elements of this stream,
 each boxed to anInteger. | 
| Stream<Double> | DoubleStream. boxed()Returns a  Streamconsisting of the elements of this stream,
 boxed toDouble. | 
| 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  Streamproduced by iterative
 application of a functionfto an initial elementseed,
 producing aStreamconsisting ofseed,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  maxSizein 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  Streamconsisting 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  Streamconsisting 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  Streamconsisting 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  Streamcontaining 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  nelements 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  Streamfrom aSpliterator. | 
| static <T> Stream<T> | StreamSupport. stream(Supplier<? extends Spliterator<T>> supplier,
      int characteristics,
      boolean parallel)Creates a new sequential or parallel  Streamfrom aSupplierofSpliterator. | 
| 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. | 
| 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. | 
| Modifier and Type | Method and Description | 
|---|---|
| Stream<? extends ZipEntry> | ZipFile. stream()Return an ordered  Streamover the ZIP file entries. | 
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