Class LongStreamEx
 Object

 LongStreamEx

 All Implemented Interfaces:
AutoCloseable
,BaseStream<Long,LongStream>
,LongStream
public class LongStreamEx extends Object implements LongStream
ALongStream
implementation with additional functionality Author:
 Tagir Valeev


Nested Class Summary
Nested Classes Modifier and Type Class Description static interface
LongStreamEx.LongEmitter
A helper interface to build a new stream by emitting elements and creating new emitters in a chain.
Nested classes/interfaces inherited from interface LongStream
LongStream.Builder


Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
allMatch(LongPredicate predicate)
boolean
anyMatch(LongPredicate predicate)
LongStreamEx
append(long... values)
Returns a newLongStreamEx
which is a concatenation of this stream and the stream containing supplied valuesLongStreamEx
append(LongStream other)
Creates a lazily concatenated stream whose elements are all the elements of this stream followed by all the elements of the other stream.DoubleStreamEx
asDoubleStream()
LongStreamEx
atLeast(long value)
Returns a stream consisting of the elements of this stream that greater than or equal to the specified value.LongStreamEx
atMost(long value)
Returns a stream consisting of the elements of this stream that less than or equal to the specified value.OptionalDouble
average()
StreamEx<Long>
boxed()
<U> U
chain(Function<? super LongStreamEx,U> mapper)
Applies the supplied function to this stream and returns the result of the function.void
close()
<R> R
collect(Supplier<R> supplier, ObjLongConsumer<R> accumulator, BiConsumer<R,R> combiner)
<A,R>
Rcollect(LongCollector<A,R> collector)
Performs a mutable reduction operation on the elements of this stream using anLongCollector
which encapsulates the supplier, accumulator and merger functions making easier to reuse collection strategies.static LongStreamEx
constant(long value, long length)
Returns a sequential unorderedLongStreamEx
of given length which elements are equal to supplied value.long
count()
LongStreamEx
distinct()
LongStreamEx
dropWhile(LongPredicate predicate)
Returns a stream consisting of all elements from this stream starting from the first element which does not match the given predicate.static LongStreamEx
empty()
Returns an empty sequentialLongStreamEx
.LongStreamEx
filter(LongPredicate predicate)
OptionalLong
findAny()
OptionalLong
findAny(LongPredicate predicate)
Returns anOptionalLong
describing some element of the stream, which matches given predicate, or an emptyOptionalLong
if there's no matching element.OptionalLong
findFirst()
OptionalLong
findFirst(LongPredicate predicate)
Returns anOptionalLong
describing the first element of this stream, which matches given predicate, or an emptyOptionalLong
if there's no matching element.LongStreamEx
flatMap(LongFunction<? extends LongStream> mapper)
DoubleStreamEx
flatMapToDouble(LongFunction<? extends DoubleStream> mapper)
Returns aDoubleStreamEx
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.IntStreamEx
flatMapToInt(LongFunction<? extends IntStream> mapper)
Returns anIntStreamEx
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.<R> StreamEx<R>
flatMapToObj(LongFunction<? extends Stream<R>> mapper)
Returns aStreamEx
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.long
foldLeft(long seed, LongBinaryOperator accumulator)
Folds the elements of this stream using the provided seed object and accumulation function, going left to right.OptionalLong
foldLeft(LongBinaryOperator accumulator)
Folds the elements of this stream using the provided accumulation function, going left to right.void
forEach(LongConsumer action)
void
forEachOrdered(LongConsumer action)
static LongStreamEx
generate(LongSupplier s)
Returns an infinite sequential unordered stream where each element is generated by the providedLongSupplier
.LongStreamEx
greater(long value)
Returns a stream consisting of the elements of this stream that strictly greater than the specified value.boolean
has(long value)
Returns true if this stream contains the specified valueOptionalLong
indexOf(long value)
Returns anOptionalLong
describing the zerobased index of the first element of this stream, which equals to the given value, or an emptyOptionalLong
if there's no matching element.OptionalLong
indexOf(LongPredicate predicate)
Returns anOptionalLong
describing the zerobased index of the first element of this stream, which matches given predicate, or an emptyOptionalLong
if there's no matching element.LongStreamEx
intersperse(int delimiter)
Returns a new stream containing all the elements of the original stream interspersed with given delimiter.boolean
isParallel()
static LongStreamEx
iterate(long seed, LongPredicate predicate, LongUnaryOperator f)
Returns a sequential orderedLongStreamEx
produced by iterative application of a function to an initial element, conditioned on satisfying the supplied predicate.static LongStreamEx
iterate(long seed, LongUnaryOperator f)
Returns an infinite sequential orderedLongStreamEx
produced by iterative application of a functionf
to an initial elementseed
, producing a stream consisting ofseed
,f(seed)
,f(f(seed))
, etc.PrimitiveIterator.OfLong
iterator()
String
joining(CharSequence delimiter)
Returns aString
which is the concatenation of the results of callingString.valueOf(long)
on each element of this stream, separated by the specified delimiter, in encounter order.String
joining(CharSequence delimiter, CharSequence prefix, CharSequence suffix)
Returns aString
which is the concatenation of the results of callingString.valueOf(long)
on each element of this stream, separated by the specified delimiter, with the specified prefix and suffix in encounter order.LongStreamEx
less(long value)
Returns a stream consisting of the elements of this stream that strictly less than the specified value.LongStreamEx
limit(long maxSize)
static LongStreamEx
longs()
Returns a sequential orderedLongStreamEx
from 0 (inclusive) toLong.MAX_VALUE
(exclusive) by an incremental step of1
.LongStreamEx
map(LongUnaryOperator mapper)
LongStreamEx
mapFirst(LongUnaryOperator mapper)
Returns a stream where the first element is the replaced with the result of applying the given function while the other elements are left intact.LongStreamEx
mapLast(LongUnaryOperator mapper)
Returns a stream where the last element is the replaced with the result of applying the given function while the other elements are left intact.DoubleStreamEx
mapToDouble(LongToDoubleFunction mapper)
<K,V>
EntryStream<K,V>mapToEntry(LongFunction<? extends K> keyMapper, LongFunction<? extends V> valueMapper)
Returns anEntryStream
consisting of theMap.Entry
objects which keys and values are results of applying the given functions to the elements of this stream.IntStreamEx
mapToInt(LongToIntFunction mapper)
<U> StreamEx<U>
mapToObj(LongFunction<? extends U> mapper)
OptionalLong
max()
OptionalLong
max(Comparator<Long> comparator)
Returns the maximum element of this stream according to the providedComparator
.<V extends Comparable<? super V>>
OptionalLongmaxBy(LongFunction<V> keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.OptionalLong
maxByDouble(LongToDoubleFunction keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.OptionalLong
maxByInt(LongToIntFunction keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.OptionalLong
maxByLong(LongUnaryOperator keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.OptionalLong
min()
OptionalLong
min(Comparator<Long> comparator)
Returns the minimum element of this stream according to the providedComparator
.<V extends Comparable<? super V>>
OptionalLongminBy(LongFunction<V> keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.OptionalLong
minByDouble(LongToDoubleFunction keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.OptionalLong
minByInt(LongToIntFunction keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.OptionalLong
minByLong(LongUnaryOperator keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.boolean
noneMatch(LongPredicate predicate)
static LongStreamEx
of(long element)
Returns a sequentialLongStreamEx
containing a single element.static LongStreamEx
of(long... elements)
Returns a sequential orderedLongStreamEx
whose elements are the specified values.static LongStreamEx
of(long[] array, int startInclusive, int endExclusive)
Returns a sequentialLongStreamEx
with the specified range of the specified array as its source.static LongStreamEx
of(Long[] array)
Returns a sequential orderedLongStreamEx
whose elements are the unboxed elements of supplied array.static LongStreamEx
of(LongBuffer buf)
Returns a sequential orderedLongStreamEx
whose elements are the values in the suppliedLongBuffer
.static LongStreamEx
of(Collection<Long> collection)
Returns a sequential orderedLongStreamEx
whose elements are the unboxed elements of supplied collection.static LongStreamEx
of(OptionalLong optional)
Returns a sequentialLongStreamEx
containing anOptionalLong
value, if present, otherwise returns an emptyLongStreamEx
.static LongStreamEx
of(PrimitiveIterator.OfLong iterator)
Returns a sequential, orderedLongStreamEx
created from givenPrimitiveIterator.OfLong
.static LongStreamEx
of(Random random)
Returns an effectively unlimited stream of pseudorandomlong
values produced by givenRandom
object.static LongStreamEx
of(Random random, long streamSize)
Returns a stream producing the givenstreamSize
number of pseudorandomlong
values.static LongStreamEx
of(Random random, long randomNumberOrigin, long randomNumberBound)
Returns an effectively unlimited stream of pseudorandomlong
values, each conforming to the given origin (inclusive) and bound (exclusive).static LongStreamEx
of(Random random, long streamSize, long randomNumberOrigin, long randomNumberBound)
Returns a stream producing the givenstreamSize
number of pseudorandomlong
values, each conforming to the given origin (inclusive) and bound (exclusive).static LongStreamEx
of(Spliterator.OfLong spliterator)
Returns a sequentialLongStreamEx
created from givenSpliterator.OfLong
.static LongStreamEx
of(LongStream stream)
Returns aLongStreamEx
object which wraps givenLongStream
.LongStreamEx
onClose(Runnable closeHandler)
LongStreamEx
pairMap(LongBinaryOperator mapper)
Returns a stream consisting of the results of applying the given function to the every adjacent pair of elements of this stream.LongStreamEx
parallel()
LongStreamEx
parallel(ForkJoinPool fjp)
Returns an equivalent stream that is parallel and bound to the suppliedForkJoinPool
.LongStreamEx
peek(LongConsumer action)
LongStreamEx
peekFirst(LongConsumer action)
Returns a stream consisting of the elements of this stream, additionally performing the provided action on the first stream element when it's consumed from the resulting stream.LongStreamEx
peekLast(LongConsumer action)
Returns a stream consisting of the elements of this stream, additionally performing the provided action on the last stream element when it's consumed from the resulting stream.LongStreamEx
prefix(LongBinaryOperator op)
Returns a stream containing cumulative results of applying the accumulation function going left to right.LongStreamEx
prepend(long... values)
Returns a newLongStreamEx
which is a concatenation of the stream containing supplied values and this streamLongStreamEx
prepend(LongStream other)
Creates a lazily concatenated stream whose elements are all the elements of the other stream followed by all the elements of this stream.static LongStreamEx
produce(Predicate<LongConsumer> producer)
Return an ordered stream produced by consecutive calls of the supplied producer until it returns false.static LongStreamEx
range(long endExclusive)
Returns a sequential orderedLongStreamEx
from 0 (inclusive) toendExclusive
(exclusive) by an incremental step of1
.static LongStreamEx
range(long startInclusive, long endExclusive)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendExclusive
(exclusive) by an incremental step of1
.static LongStreamEx
range(long startInclusive, long endExclusive, long step)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendExclusive
(exclusive) by the specified incremental step.static LongStreamEx
rangeClosed(long startInclusive, long endInclusive)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendInclusive
(inclusive) by an incremental step of1
.static LongStreamEx
rangeClosed(long startInclusive, long endInclusive, long step)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendInclusive
(inclusive) by the specified incremental step.long
reduce(long identity, LongBinaryOperator op)
OptionalLong
reduce(LongBinaryOperator op)
LongStreamEx
remove(LongPredicate predicate)
Returns a stream consisting of the elements of this stream that don't match the given predicate.LongStreamEx
reverseSorted()
Returns a stream consisting of the elements of this stream in reverse sorted order.long[]
scanLeft(long seed, LongBinaryOperator accumulator)
Produces an array containing cumulative results of applying the accumulation function going left to right using given seed value.long[]
scanLeft(LongBinaryOperator accumulator)
Produces an array containing cumulative results of applying the accumulation function going left to right.LongStreamEx
sequential()
LongStreamEx
skip(long n)
LongStreamEx
sorted()
LongStreamEx
sorted(Comparator<Long> comparator)
Returns a stream consisting of the elements of this stream sorted according to the given comparator.<V extends Comparable<? super V>>
LongStreamExsortedBy(LongFunction<V> keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the natural order of the keys extracted by provided function.LongStreamEx
sortedByDouble(LongToDoubleFunction keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the double values extracted by provided function.LongStreamEx
sortedByInt(LongToIntFunction keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the int values extracted by provided function.LongStreamEx
sortedByLong(LongUnaryOperator keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the long values extracted by provided function.SPLTR
spliterator()
long
sum()
LongSummaryStatistics
summaryStatistics()
LongStreamEx
takeWhile(LongPredicate predicate)
Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found.LongStreamEx
takeWhileInclusive(LongPredicate predicate)
Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found (including the first mismatching element).long[]
toArray()
LongStreamEx
unordered()
LongStreamEx
without(long value)
Returns a stream consisting of the elements of this stream that don't equal to the given value.LongStreamEx
without(long... values)
Returns a stream consisting of the elements of this stream that don't equal to any of the supplied values.static LongStreamEx
zip(long[] first, long[] second, LongBinaryOperator mapper)
Returns a sequentialLongStreamEx
containing the results of applying the given function to the corresponding pairs of values in given two arrays.
Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface BaseStream
close, isParallel

Methods inherited from interface LongStream
spliterator




Method Detail

unordered
public LongStreamEx unordered()
 Specified by:
unordered
in interfaceBaseStream<Long,LongStream>

onClose
public LongStreamEx onClose(Runnable closeHandler)
 Specified by:
onClose
in interfaceBaseStream<Long,LongStream>

filter
public LongStreamEx filter(LongPredicate predicate)
 Specified by:
filter
in interfaceLongStream

remove
public LongStreamEx remove(LongPredicate predicate)
Returns a stream consisting of the elements of this stream that don't match the given predicate.This is an intermediate operation.
 Parameters:
predicate
 a noninterfering, stateless predicate to apply to each element to determine if it should be excluded Returns:
 the new stream

has
public boolean has(long value)
Returns true if this stream contains the specified valueThis is a shortcircuiting terminal operation.
 Parameters:
value
 the value too look for in the stream Returns:
 true if this stream contains the specified value
 See Also:
LongStream.anyMatch(LongPredicate)

without
public LongStreamEx without(long value)
Returns a stream consisting of the elements of this stream that don't equal to the given value.This is an intermediate operation.
 Parameters:
value
 the value to remove from the stream. Returns:
 the new stream
 Since:
 0.2.2
 See Also:
without(long...)
,remove(LongPredicate)

without
public LongStreamEx without(long... values)
Returns a stream consisting of the elements of this stream that don't equal to any of the supplied values.This is an intermediate operation. May return itself if no values were supplied.
Current implementation scans the supplied values linearly for every stream element.
If the
values
array is changed between calling this method and finishing the stream traversal, then the result of the stream traversal is undefined: changes may or may not be taken into account. Parameters:
values
 the values to remove from the stream. Returns:
 the new stream
 Since:
 0.5.5
 See Also:
without(long)
,remove(LongPredicate)

greater
public LongStreamEx greater(long value)
Returns a stream consisting of the elements of this stream that strictly greater than the specified value.This is an intermediate operation.
 Parameters:
value
 a value to compare to Returns:
 the new stream
 Since:
 0.2.3

atLeast
public LongStreamEx atLeast(long value)
Returns a stream consisting of the elements of this stream that greater than or equal to the specified value.This is an intermediate operation.
 Parameters:
value
 a value to compare to Returns:
 the new stream
 Since:
 0.2.3

less
public LongStreamEx less(long value)
Returns a stream consisting of the elements of this stream that strictly less than the specified value.This is an intermediate operation.
 Parameters:
value
 a value to compare to Returns:
 the new stream
 Since:
 0.2.3

atMost
public LongStreamEx atMost(long value)
Returns a stream consisting of the elements of this stream that less than or equal to the specified value.This is an intermediate operation.
 Parameters:
value
 a value to compare to Returns:
 the new stream
 Since:
 0.2.3

map
public LongStreamEx map(LongUnaryOperator mapper)
 Specified by:
map
in interfaceLongStream

mapFirst
public LongStreamEx mapFirst(LongUnaryOperator mapper)
Returns a stream where the first element is the replaced with the result of applying the given function while the other elements are left intact.This is a quasiintermediate operation.
 Parameters:
mapper
 a noninterfering , stateless function to apply to the first element Returns:
 the new stream
 Since:
 0.4.1

mapLast
public LongStreamEx mapLast(LongUnaryOperator mapper)
Returns a stream where the last element is the replaced with the result of applying the given function while the other elements are left intact.This is a quasiintermediate operation.
The mapper function is called at most once. It could be not called at all if the stream is empty or there is shortcircuiting operation downstream.
 Parameters:
mapper
 a noninterfering , stateless function to apply to the last element Returns:
 the new stream
 Since:
 0.4.1

mapToObj
public <U> StreamEx<U> mapToObj(LongFunction<? extends U> mapper)
 Specified by:
mapToObj
in interfaceLongStream

mapToInt
public IntStreamEx mapToInt(LongToIntFunction mapper)
 Specified by:
mapToInt
in interfaceLongStream

mapToDouble
public DoubleStreamEx mapToDouble(LongToDoubleFunction mapper)
 Specified by:
mapToDouble
in interfaceLongStream

mapToEntry
public <K,V> EntryStream<K,V> mapToEntry(LongFunction<? extends K> keyMapper, LongFunction<? extends V> valueMapper)
Returns anEntryStream
consisting of theMap.Entry
objects which keys and values are results of applying the given functions to the elements of this stream.This is an intermediate operation.
 Type Parameters:
K
 TheEntry
key typeV
 TheEntry
value type Parameters:
keyMapper
 a noninterfering, stateless function to apply to each elementvalueMapper
 a noninterfering, stateless function to apply to each element Returns:
 the new stream
 Since:
 0.3.1

flatMap
public LongStreamEx flatMap(LongFunction<? extends LongStream> mapper)
 Specified by:
flatMap
in interfaceLongStream

flatMapToInt
public IntStreamEx flatMapToInt(LongFunction<? extends IntStream> mapper)
Returns anIntStreamEx
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. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream isnull
an empty stream is used, instead.)This is an intermediate operation.
 Parameters:
mapper
 a noninterfering, stateless function to apply to each element which produces anIntStream
of new values Returns:
 the new stream
 Since:
 0.3.0

flatMapToDouble
public DoubleStreamEx flatMapToDouble(LongFunction<? extends DoubleStream> mapper)
Returns aDoubleStreamEx
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. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream isnull
an empty stream is used, instead.)This is an intermediate operation.
 Parameters:
mapper
 a noninterfering, stateless function to apply to each element which produces anDoubleStream
of new values Returns:
 the new stream
 Since:
 0.3.0

flatMapToObj
public <R> StreamEx<R> flatMapToObj(LongFunction<? extends Stream<R>> mapper)
Returns aStreamEx
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. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream isnull
an empty stream is used, instead.)This is an intermediate operation.
 Type Parameters:
R
 The element type of the new stream Parameters:
mapper
 a noninterfering, stateless function to apply to each element which produces aStream
of new values Returns:
 the new stream
 Since:
 0.3.0

intersperse
public LongStreamEx intersperse(int delimiter)
Returns a new stream containing all the elements of the original stream interspersed with given delimiter.For example,
LongStreamEx.of(1, 2, 3).intersperse(4)
will yield a stream containing five elements: 1, 4, 2, 4, 3.This is an intermediate operation.
 Parameters:
delimiter
 a delimiter to be inserted between each pair of elements Returns:
 the new stream
 Since:
 0.6.6

distinct
public LongStreamEx distinct()
 Specified by:
distinct
in interfaceLongStream

sorted
public LongStreamEx sorted()
 Specified by:
sorted
in interfaceLongStream

sorted
public LongStreamEx sorted(Comparator<Long> comparator)
Returns a stream consisting of the elements of this stream sorted according to the given comparator. Stream elements are boxed before passing to the comparator.For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
 Parameters:
comparator
 a noninterfering , statelessComparator
to be used to compare stream elements Returns:
 the new stream

reverseSorted
public LongStreamEx reverseSorted()
Returns a stream consisting of the elements of this stream in reverse sorted order.This is a stateful intermediate operation.
 Returns:
 the new stream
 Since:
 0.0.8

sortedBy
public <V extends Comparable<? super V>> LongStreamEx sortedBy(LongFunction<V> keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the natural order of the keys extracted by provided function.For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
 Type Parameters:
V
 the type of theComparable
sort key Parameters:
keyExtractor
 a noninterfering , stateless function to be used to extract sorting keys Returns:
 the new stream

sortedByInt
public LongStreamEx sortedByInt(LongToIntFunction keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the int values extracted by provided function.For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
 Parameters:
keyExtractor
 a noninterfering , stateless function to be used to extract sorting keys Returns:
 the new stream

sortedByLong
public LongStreamEx sortedByLong(LongUnaryOperator keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the long values extracted by provided function.For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
 Parameters:
keyExtractor
 a noninterfering , stateless function to be used to extract sorting keys Returns:
 the new stream

sortedByDouble
public LongStreamEx sortedByDouble(LongToDoubleFunction keyExtractor)
Returns a stream consisting of the elements of this stream, sorted according to the double values extracted by provided function.For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
 Parameters:
keyExtractor
 a noninterfering , stateless function to be used to extract sorting keys Returns:
 the new stream

peek
public LongStreamEx peek(LongConsumer action)
 Specified by:
peek
in interfaceLongStream

peekFirst
public LongStreamEx peekFirst(LongConsumer action)
Returns a stream consisting of the elements of this stream, additionally performing the provided action on the first stream element when it's consumed from the resulting stream.This is an intermediate operation.
The action is called at most once. For parallel stream pipelines, it's not guaranteed in which thread it will be executed, so if it modifies shared state, it is responsible for providing the required synchronization.
Note that the action might not be called at all if the first element is not consumed from the input (for example, if there's shortcircuiting operation downstream which stopped the stream before the first element).
This method exists mainly to support debugging.
 Parameters:
action
 a noninterfering action to perform on the first stream element as it is consumed from the stream Returns:
 the new stream
 Since:
 0.6.0

peekLast
public LongStreamEx peekLast(LongConsumer action)
Returns a stream consisting of the elements of this stream, additionally performing the provided action on the last stream element when it's consumed from the resulting stream.This is an intermediate operation.
The action is called at most once. For parallel stream pipelines, it's not guaranteed in which thread it will be executed, so if it modifies shared state, it is responsible for providing the required synchronization.
Note that the action might not be called at all if the last element is not consumed from the input (for example, if there's shortcircuiting operation downstream).
This method exists mainly to support debugging.
 Parameters:
action
 a noninterfering action to perform on the first stream element as it is consumed from the stream Returns:
 the new stream
 Since:
 0.6.0

limit
public LongStreamEx limit(long maxSize)
 Specified by:
limit
in interfaceLongStream

skip
public LongStreamEx skip(long n)
 Specified by:
skip
in interfaceLongStream

forEach
public void forEach(LongConsumer action)
 Specified by:
forEach
in interfaceLongStream

forEachOrdered
public void forEachOrdered(LongConsumer action)
 Specified by:
forEachOrdered
in interfaceLongStream

toArray
public long[] toArray()
 Specified by:
toArray
in interfaceLongStream

reduce
public long reduce(long identity, LongBinaryOperator op)
 Specified by:
reduce
in interfaceLongStream

reduce
public OptionalLong reduce(LongBinaryOperator op)
 Specified by:
reduce
in interfaceLongStream

foldLeft
public OptionalLong foldLeft(LongBinaryOperator accumulator)
Folds the elements of this stream using the provided accumulation function, going left to right. This is equivalent to:boolean foundAny = false; long result = 0; for (long element : this stream) { if (!foundAny) { foundAny = true; result = element; } else result = accumulator.apply(result, element); } return foundAny ? OptionalLong.of(result) : OptionalLong.empty();
This is a terminal operation.
This method cannot take all the advantages of parallel streams as it must process elements strictly left to right. If your accumulator function is associative, consider using
reduce(LongBinaryOperator)
method.For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
 Parameters:
accumulator
 a noninterfering , stateless function for incorporating an additional element into a result Returns:
 the result of the folding
 Since:
 0.4.0
 See Also:
foldLeft(long, LongBinaryOperator)
,reduce(LongBinaryOperator)

foldLeft
public long foldLeft(long seed, LongBinaryOperator accumulator)
Folds the elements of this stream using the provided seed object and accumulation function, going left to right. This is equivalent to:long result = seed; for (long element : this stream) result = accumulator.apply(result, element) return result;
This is a terminal operation.
This method cannot take all the advantages of parallel streams as it must process elements strictly left to right. If your accumulator function is associative, consider using
reduce(long, LongBinaryOperator)
method.For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
 Parameters:
seed
 the starting valueaccumulator
 a noninterfering , stateless function for incorporating an additional element into a result Returns:
 the result of the folding
 Since:
 0.4.0
 See Also:
reduce(long, LongBinaryOperator)
,foldLeft(LongBinaryOperator)

scanLeft
public long[] scanLeft(LongBinaryOperator accumulator)
Produces an array containing cumulative results of applying the accumulation function going left to right.This is a terminal operation.
For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
This method cannot take all the advantages of parallel streams as it must process elements strictly left to right.
 Parameters:
accumulator
 a noninterfering , stateless function for incorporating an additional element into a result Returns:
 the array where the first element is the first element of this stream and every successor element is the result of applying accumulator function to the previous array element and the corresponding stream element. The resulting array has the same length as this stream.
 Since:
 0.5.1
 See Also:
foldLeft(LongBinaryOperator)

scanLeft
public long[] scanLeft(long seed, LongBinaryOperator accumulator)
Produces an array containing cumulative results of applying the accumulation function going left to right using given seed value.This is a terminal operation.
For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
This method cannot take all the advantages of parallel streams as it must process elements strictly left to right.
 Parameters:
seed
 the starting valueaccumulator
 a noninterfering , stateless function for incorporating an additional element into a result Returns:
 the array where the first element is the seed and every successor element is the result of applying accumulator function to the previous array element and the corresponding stream element. The resulting array is one element longer than this stream.
 Since:
 0.5.1
 See Also:
foldLeft(long, LongBinaryOperator)

collect
public <R> R collect(Supplier<R> supplier, ObjLongConsumer<R> accumulator, BiConsumer<R,R> combiner)
 Specified by:
collect
in interfaceLongStream
 See Also:
collect(LongCollector)

collect
public <A,R> R collect(LongCollector<A,R> collector)
Performs a mutable reduction operation on the elements of this stream using anLongCollector
which encapsulates the supplier, accumulator and merger functions making easier to reuse collection strategies.Like
reduce(long, LongBinaryOperator)
,collect
operations can be parallelized without requiring additional synchronization.This is a terminal operation.
 Type Parameters:
A
 the intermediate accumulation type of theLongCollector
R
 type of the result Parameters:
collector
 theLongCollector
describing the reduction Returns:
 the result of the reduction
 Since:
 0.3.0
 See Also:
collect(Supplier, ObjLongConsumer, BiConsumer)

sum
public long sum()
 Specified by:
sum
in interfaceLongStream

min
public OptionalLong min()
 Specified by:
min
in interfaceLongStream

min
public OptionalLong min(Comparator<Long> comparator)
Returns the minimum element of this stream according to the providedComparator
.This is a terminal operation.
 Parameters:
comparator
 a noninterfering, statelessComparator
to compare elements of this stream Returns:
 an
OptionalLong
describing the minimum element of this stream, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

minBy
public <V extends Comparable<? super V>> OptionalLong minBy(LongFunction<V> keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.This is a terminal operation.
 Type Parameters:
V
 the type of theComparable
sort key Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the lowest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

minByInt
public OptionalLong minByInt(LongToIntFunction keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.This is a terminal operation.
 Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the lowest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

minByLong
public OptionalLong minByLong(LongUnaryOperator keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.This is a terminal operation.
 Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the lowest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

minByDouble
public OptionalLong minByDouble(LongToDoubleFunction keyExtractor)
Returns the minimum element of this stream according to the provided key extractor function.This is a terminal operation.
 Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the lowest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

max
public OptionalLong max()
 Specified by:
max
in interfaceLongStream

max
public OptionalLong max(Comparator<Long> comparator)
Returns the maximum element of this stream according to the providedComparator
.This is a terminal operation.
 Parameters:
comparator
 a noninterfering, statelessComparator
to compare elements of this stream Returns:
 an
OptionalLong
describing the maximum element of this stream, or an emptyOptionalLong
if the stream is empty

maxBy
public <V extends Comparable<? super V>> OptionalLong maxBy(LongFunction<V> keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.This is a terminal operation.
 Type Parameters:
V
 the type of theComparable
sort key Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the highest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

maxByInt
public OptionalLong maxByInt(LongToIntFunction keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.This is a terminal operation.
 Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the highest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

maxByLong
public OptionalLong maxByLong(LongUnaryOperator keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.This is a terminal operation.
 Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the highest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

maxByDouble
public OptionalLong maxByDouble(LongToDoubleFunction keyExtractor)
Returns the maximum element of this stream according to the provided key extractor function.This is a terminal operation.
 Parameters:
keyExtractor
 a noninterfering, stateless function Returns:
 an
OptionalLong
describing the first element of this stream for which the highest value was returned by key extractor, or an emptyOptionalLong
if the stream is empty  Since:
 0.1.2

count
public long count()
 Specified by:
count
in interfaceLongStream

average
public OptionalDouble average()
 Specified by:
average
in interfaceLongStream

summaryStatistics
public LongSummaryStatistics summaryStatistics()
 Specified by:
summaryStatistics
in interfaceLongStream

anyMatch
public boolean anyMatch(LongPredicate predicate)
 Specified by:
anyMatch
in interfaceLongStream

allMatch
public boolean allMatch(LongPredicate predicate)
 Specified by:
allMatch
in interfaceLongStream

noneMatch
public boolean noneMatch(LongPredicate predicate)
 Specified by:
noneMatch
in interfaceLongStream

findFirst
public OptionalLong findFirst()
 Specified by:
findFirst
in interfaceLongStream

findFirst
public OptionalLong findFirst(LongPredicate predicate)
Returns anOptionalLong
describing the first element of this stream, which matches given predicate, or an emptyOptionalLong
if there's no matching element.This is a shortcircuiting terminal operation.
 Parameters:
predicate
 a noninterfering , stateless predicate which returned value should match Returns:
 an
OptionalLong
describing the first matching element of this stream, or an emptyOptionalLong
if there's no matching element  See Also:
findFirst()

findAny
public OptionalLong findAny()
 Specified by:
findAny
in interfaceLongStream

findAny
public OptionalLong findAny(LongPredicate predicate)
Returns anOptionalLong
describing some element of the stream, which matches given predicate, or an emptyOptionalLong
if there's no matching element.This is a shortcircuiting terminal operation.
The behavior of this operation is explicitly nondeterministic; it is free to select any element in the stream. This is to allow for maximal performance in parallel operations; the cost is that multiple invocations on the same source may not return the same result. (If a stable result is desired, use
findFirst(LongPredicate)
instead.) Parameters:
predicate
 a noninterfering , stateless predicate which returned value should match Returns:
 an
OptionalLong
describing some matching element of this stream, or an emptyOptionalLong
if there's no matching element  See Also:
findAny()
,findFirst(LongPredicate)

indexOf
public OptionalLong indexOf(long value)
Returns anOptionalLong
describing the zerobased index of the first element of this stream, which equals to the given value, or an emptyOptionalLong
if there's no matching element.This is a shortcircuiting terminal operation.
 Parameters:
value
 a value to look for Returns:
 an
OptionalLong
describing the index of the first matching element of this stream, or an emptyOptionalLong
if there's no matching element.  Since:
 0.4.0
 See Also:
indexOf(LongPredicate)

indexOf
public OptionalLong indexOf(LongPredicate predicate)
Returns anOptionalLong
describing the zerobased index of the first element of this stream, which matches given predicate, or an emptyOptionalLong
if there's no matching element.This is a shortcircuiting terminal operation.
 Parameters:
predicate
 a noninterfering , stateless predicate which returned value should match Returns:
 an
OptionalLong
describing the index of the first matching element of this stream, or an emptyOptionalLong
if there's no matching element.  Since:
 0.4.0
 See Also:
findFirst(LongPredicate)

asDoubleStream
public DoubleStreamEx asDoubleStream()
 Specified by:
asDoubleStream
in interfaceLongStream

boxed
public StreamEx<Long> boxed()
 Specified by:
boxed
in interfaceLongStream

sequential
public LongStreamEx sequential()
 Specified by:
sequential
in interfaceBaseStream<Long,LongStream>
 Specified by:
sequential
in interfaceLongStream

parallel
public LongStreamEx parallel()
If this stream was created using
parallel(ForkJoinPool)
, the new stream forgets about supplied customForkJoinPool
and its terminal operation will be executed in common pool. Specified by:
parallel
in interfaceBaseStream<Long,LongStream>
 Specified by:
parallel
in interfaceLongStream

parallel
public LongStreamEx parallel(ForkJoinPool fjp)
Returns an equivalent stream that is parallel and bound to the suppliedForkJoinPool
.This is an intermediate operation.
The terminal operation of this stream or any derived stream (except the streams created via
BaseStream.parallel()
orBaseStream.sequential()
methods) will be executed inside the suppliedForkJoinPool
. If current thread does not belong to that pool, it will wait till calculation finishes. Parameters:
fjp
 aForkJoinPool
to submit the stream operation to. Returns:
 a parallel stream bound to the supplied
ForkJoinPool

iterator
public PrimitiveIterator.OfLong iterator()
 Specified by:
iterator
in interfaceBaseStream<Long,LongStream>
 Specified by:
iterator
in interfaceLongStream

append
public LongStreamEx append(long... values)
Returns a newLongStreamEx
which is a concatenation of this stream and the stream containing supplied valuesThis is a quasiintermediate operation.
 Parameters:
values
 the values to append to the stream Returns:
 the new stream

append
public LongStreamEx append(LongStream other)
Creates a lazily concatenated stream whose elements are all the elements of this stream followed by all the elements of the other stream. The resulting stream is ordered if both of the input streams are ordered, and parallel if either of the input streams is parallel. When the resulting stream is closed, the close handlers for both input streams are invoked. Parameters:
other
 the other stream Returns:
 this stream appended by the other stream
 See Also:
LongStream.concat(LongStream, LongStream)

prepend
public LongStreamEx prepend(long... values)
Returns a newLongStreamEx
which is a concatenation of the stream containing supplied values and this streamThis is a quasiintermediate operation.
 Parameters:
values
 the values to prepend to the stream Returns:
 the new stream

prepend
public LongStreamEx prepend(LongStream other)
Creates a lazily concatenated stream whose elements are all the elements of the other stream followed by all the elements of this stream. The resulting stream is ordered if both of the input streams are ordered, and parallel if either of the input streams is parallel. When the resulting stream is closed, the close handlers for both input streams are invoked. Parameters:
other
 the other stream Returns:
 this stream prepended by the other stream
 See Also:
LongStream.concat(LongStream, LongStream)

pairMap
public LongStreamEx pairMap(LongBinaryOperator mapper)
Returns a stream consisting of the results of applying the given function to the every adjacent pair of elements of this stream.This is a quasiintermediate operation.
The output stream will contain one element less than this stream. If this stream contains zero or one element the output stream will be empty.
 Parameters:
mapper
 a noninterfering, stateless function to apply to each adjacent pair of this stream elements. Returns:
 the new stream
 Since:
 0.2.1

joining
public String joining(CharSequence delimiter)
Returns aString
which is the concatenation of the results of callingString.valueOf(long)
on each element of this stream, separated by the specified delimiter, in encounter order.This is a terminal operation.
 Parameters:
delimiter
 the delimiter to be used between each element Returns:
 the result of concatenation. For empty input stream empty String is returned.
 Since:
 0.3.1

joining
public String joining(CharSequence delimiter, CharSequence prefix, CharSequence suffix)
Returns aString
which is the concatenation of the results of callingString.valueOf(long)
on each element of this stream, separated by the specified delimiter, with the specified prefix and suffix in encounter order.This is a terminal operation.
 Parameters:
delimiter
 the delimiter to be used between each elementprefix
 the sequence of characters to be used at the beginning of the joined resultsuffix
 the sequence of characters to be used at the end of the joined result Returns:
 the result of concatenation. For empty input stream
prefix + suffix
is returned.  Since:
 0.3.1

takeWhile
public LongStreamEx takeWhile(LongPredicate predicate)
Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found.This is a shortcircuiting stateful operation. It can be either intermediate or quasiintermediate. When using with JDK 1.9 or higher it calls the corresponding JDK 1.9 implementation. When using with JDK 1.8 it uses own implementation.
While this operation is quite cheap for sequential stream, it can be quite expensive on parallel pipelines.
 Specified by:
takeWhile
in interfaceLongStream
 Parameters:
predicate
 a noninterfering, stateless predicate to apply to elements. Returns:
 the new stream.
 Since:
 0.3.6
 See Also:
takeWhileInclusive(LongPredicate)
,dropWhile(LongPredicate)

takeWhileInclusive
public LongStreamEx takeWhileInclusive(LongPredicate predicate)
Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found (including the first mismatching element).This is a quasiintermediate operation.
While this operation is quite cheap for sequential stream, it can be quite expensive on parallel pipelines.
 Parameters:
predicate
 a noninterfering, stateless predicate to apply to elements. Returns:
 the new stream.
 Since:
 0.5.5
 See Also:
takeWhile(LongPredicate)

dropWhile
public LongStreamEx dropWhile(LongPredicate predicate)
Returns a stream consisting of all elements from this stream starting from the first element which does not match the given predicate. If the predicate is true for all stream elements, an empty stream is returned.This is a stateful operation. It can be either intermediate or quasiintermediate. When using with JDK 1.9 or higher it calls the corresponding JDK 1.9 implementation. When using with JDK 1.8 it uses own implementation.
While this operation is quite cheap for sequential stream, it can be quite expensive on parallel pipelines.
 Specified by:
dropWhile
in interfaceLongStream
 Parameters:
predicate
 a noninterfering, stateless predicate to apply to elements. Returns:
 the new stream.
 Since:
 0.3.6

prefix
public LongStreamEx prefix(LongBinaryOperator op)
Returns a stream containing cumulative results of applying the accumulation function going left to right.This is a stateful quasiintermediate operation.
This operation resembles
scanLeft(LongBinaryOperator)
, but unlikescanLeft
this operation is intermediate and accumulation function must be associative.This method cannot take all the advantages of parallel streams as it must process elements strictly left to right. Using an unordered source or removing the ordering constraint with
unordered()
may improve the parallel processing speed. Parameters:
op
 an associative , noninterfering , stateless function for computing the next element based on the previous one Returns:
 the new stream.
 Since:
 0.6.1
 See Also:
scanLeft(LongBinaryOperator)

chain
public <U> U chain(Function<? super LongStreamEx,U> mapper)
Applies the supplied function to this stream and returns the result of the function.This method can be used to add more functionality in the fluent style. For example, consider userdefined static method
batches(stream, n)
which breaks the stream into batches of given length. Normally you would writebatches(StreamEx.of(input).map(...), 10).filter(...)
. Using thechain()
method you can write in more fluent manner:StreamEx.of(input).map(...).chain(s > batches(s, 10)).filter(...)
.You could even go further and define a method which returns a function like
<T> UnaryOperator<StreamEx<T>> batches(int n)
and use it like this:StreamEx.of(input).map(...).chain(batches(10)).filter(...)
. Type Parameters:
U
 the type of the function result. Parameters:
mapper
 function to invoke. Returns:
 the result of the function invocation.

empty
public static LongStreamEx empty()
Returns an empty sequentialLongStreamEx
. Returns:
 an empty sequential stream

of
public static LongStreamEx of(long element)
Returns a sequentialLongStreamEx
containing a single element. Parameters:
element
 the single element Returns:
 a singleton sequential stream

of
public static LongStreamEx of(long... elements)
Returns a sequential orderedLongStreamEx
whose elements are the specified values. Parameters:
elements
 the elements of the new stream Returns:
 the new stream

of
public static LongStreamEx of(long[] array, int startInclusive, int endExclusive)
Returns a sequentialLongStreamEx
with the specified range of the specified array as its source. Parameters:
array
 the array, assumed to be unmodified during usestartInclusive
 the first index to cover, inclusiveendExclusive
 index immediately past the last index to cover Returns:
 an
LongStreamEx
for the array range  Throws:
ArrayIndexOutOfBoundsException
 ifstartInclusive
is negative,endExclusive
is less thanstartInclusive
, orendExclusive
is greater than the array size Since:
 0.1.1
 See Also:
Arrays.stream(long[], int, int)

of
public static LongStreamEx of(Long[] array)
Returns a sequential orderedLongStreamEx
whose elements are the unboxed elements of supplied array. Parameters:
array
 the array to create the stream from. Returns:
 the new stream
 Since:
 0.5.0
 See Also:
Arrays.stream(Object[])

of
public static LongStreamEx of(LongBuffer buf)
Returns a sequential orderedLongStreamEx
whose elements are the values in the suppliedLongBuffer
.The resulting stream covers only a portion of
LongBuffer
content which starts with position (inclusive) and ends with limit (exclusive). Changes in position and limit after the stream creation don't affect the stream.The resulting stream does not change the internal
LongBuffer
state. Parameters:
buf
 theLongBuffer
to create a stream from Returns:
 the new stream
 Since:
 0.6.2

of
public static LongStreamEx of(LongStream stream)
Returns aLongStreamEx
object which wraps givenLongStream
.The supplied stream must not be consumed or closed when this method is called. No operation must be performed on the supplied stream after it's wrapped.
 Parameters:
stream
 original stream Returns:
 the wrapped stream
 Since:
 0.0.8

of
public static LongStreamEx of(Spliterator.OfLong spliterator)
Returns a sequentialLongStreamEx
created from givenSpliterator.OfLong
. Parameters:
spliterator
 a spliterator to create the stream from. Returns:
 the new stream
 Since:
 0.3.4

of
public static LongStreamEx of(PrimitiveIterator.OfLong iterator)
Returns a sequential, orderedLongStreamEx
created from givenPrimitiveIterator.OfLong
.This method is roughly equivalent to
LongStreamEx.of(Spliterators.spliteratorUnknownSize(iterator, ORDERED))
, but may show better performance for parallel processing.Use this method only if you cannot provide better Stream source.
 Parameters:
iterator
 an iterator to create the stream from. Returns:
 the new stream
 Since:
 0.5.1

of
public static LongStreamEx of(OptionalLong optional)
Returns a sequentialLongStreamEx
containing anOptionalLong
value, if present, otherwise returns an emptyLongStreamEx
. Parameters:
optional
 the optional to create a stream of Returns:
 a stream with an
OptionalLong
value if present, otherwise an empty stream  Since:
 0.1.1

of
public static LongStreamEx of(Collection<Long> collection)
Returns a sequential orderedLongStreamEx
whose elements are the unboxed elements of supplied collection. Parameters:
collection
 the collection to create the stream from. Returns:
 the new stream
 See Also:
Collection.stream()

of
public static LongStreamEx of(Random random)
Returns an effectively unlimited stream of pseudorandomlong
values produced by givenRandom
object.A pseudorandom
long
value is generated as if it's the result of calling the methodRandom.nextLong()
. Parameters:
random
 aRandom
object to produce the stream from Returns:
 a stream of pseudorandom
long
values  See Also:
Random.longs()

of
public static LongStreamEx of(Random random, long streamSize)
Returns a stream producing the givenstreamSize
number of pseudorandomlong
values.A pseudorandom
long
value is generated as if it's the result of calling the methodRandom.nextLong()
 Parameters:
random
 aRandom
object to produce the stream fromstreamSize
 the number of values to generate Returns:
 a stream of pseudorandom
long
values  See Also:
Random.longs(long)

of
public static LongStreamEx of(Random random, long randomNumberOrigin, long randomNumberBound)
Returns an effectively unlimited stream of pseudorandomlong
values, each conforming to the given origin (inclusive) and bound (exclusive). Parameters:
random
 aRandom
object to produce the stream fromrandomNumberOrigin
 the origin (inclusive) of each random valuerandomNumberBound
 the bound (exclusive) of each random value Returns:
 a stream of pseudorandom
long
values  See Also:
Random.longs(long, long, long)

of
public static LongStreamEx of(Random random, long streamSize, long randomNumberOrigin, long randomNumberBound)
Returns a stream producing the givenstreamSize
number of pseudorandomlong
values, each conforming to the given origin (inclusive) and bound (exclusive). Parameters:
random
 aRandom
object to produce the stream fromstreamSize
 the number of values to generaterandomNumberOrigin
 the origin (inclusive) of each random valuerandomNumberBound
 the bound (exclusive) of each random value Returns:
 a stream of pseudorandom
long
values  See Also:
Random.longs(long, long, long)

iterate
public static LongStreamEx iterate(long seed, LongUnaryOperator f)
Returns an infinite sequential orderedLongStreamEx
produced by iterative application of a functionf
to an initial elementseed
, producing a stream consisting ofseed
,f(seed)
,f(f(seed))
, etc.The first element (position
0
) in theLongStreamEx
will be the providedseed
. Forn > 0
, the element at positionn
, will be the result of applying the functionf
to the element at positionn  1
. Parameters:
seed
 the initial elementf
 a function to be applied to to the previous element to produce a new element Returns:
 A new sequential
LongStream
 See Also:
iterate(long, LongPredicate, LongUnaryOperator)

iterate
public static LongStreamEx iterate(long seed, LongPredicate predicate, LongUnaryOperator f)
Returns a sequential orderedLongStreamEx
produced by iterative application of a function to an initial element, conditioned on satisfying the supplied predicate. The stream terminates as soon as the predicate function returns false.LongStreamEx.iterate
should produce the same sequence of elements as produced by the corresponding forloop:for (long index=seed; predicate.test(index); index = f.apply(index)) { ... }
The resulting sequence may be empty if the predicate does not hold on the seed value. Otherwise the first element will be the supplied seed value, the next element (if present) will be the result of applying the function f to the seed value, and so on iteratively until the predicate indicates that the stream should terminate.
 Parameters:
seed
 the initial elementpredicate
 a predicate to apply to elements to determine when the stream must terminate.f
 a function to be applied to the previous element to produce a new element Returns:
 a new sequential
LongStreamEx
 Since:
 0.6.0
 See Also:
iterate(long, LongUnaryOperator)

generate
public static LongStreamEx generate(LongSupplier s)
Returns an infinite sequential unordered stream where each element is generated by the providedLongSupplier
. This is suitable for generating constant streams, streams of random elements, etc. Parameters:
s
 theLongSupplier
for generated elements Returns:
 a new infinite sequential unordered
LongStreamEx
 See Also:
LongStream.generate(LongSupplier)

produce
public static LongStreamEx produce(Predicate<LongConsumer> producer)
Return an ordered stream produced by consecutive calls of the supplied producer until it returns false.The producer function may call the passed consumer any number of times and return true if the producer should be called again or false otherwise. It's guaranteed that the producer will not be called anymore, once it returns false.
This method is particularly useful when producer changes the mutable object which should be left in known state after the full stream consumption. Note however that if a shortcircuiting operation is used, then the final state of the mutable object cannot be guaranteed.
 Parameters:
producer
 a predicate which calls the passed consumer to emit stream element(s) and returns true if it producer should be applied again. Returns:
 the new stream
 Since:
 0.6.0

longs
public static LongStreamEx longs()
Returns a sequential orderedLongStreamEx
from 0 (inclusive) toLong.MAX_VALUE
(exclusive) by an incremental step of1
. Returns:
 a sequential
LongStreamEx
for the range oflong
elements  Since:
 0.5.5
 See Also:
range(long, long)

range
public static LongStreamEx range(long endExclusive)
Returns a sequential orderedLongStreamEx
from 0 (inclusive) toendExclusive
(exclusive) by an incremental step of1
. Parameters:
endExclusive
 the exclusive upper bound Returns:
 a sequential
LongStreamEx
for the range ofint
elements  Since:
 0.1.1
 See Also:
range(long, long)

range
public static LongStreamEx range(long startInclusive, long endExclusive)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendExclusive
(exclusive) by an incremental step of1
. Parameters:
startInclusive
 the (inclusive) initial valueendExclusive
 the exclusive upper bound Returns:
 a sequential
LongStreamEx
for the range oflong
elements  See Also:
LongStream.range(long, long)

range
public static LongStreamEx range(long startInclusive, long endExclusive, long step)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendExclusive
(exclusive) by the specified incremental step. The negative step values are also supported. In this case, thestartInclusive
should be greater thanendExclusive
. Parameters:
startInclusive
 the (inclusive) initial valueendExclusive
 the exclusive upper (for positive step) or lower (for negative step) boundstep
 the nonzero value which designates the difference between the consecutive values of the resulting stream. Returns:
 a sequential
LongStreamEx
for the range oflong
elements  Throws:
IllegalArgumentException
 if step is zero Since:
 0.4.0
 See Also:
range(long, long)

rangeClosed
public static LongStreamEx rangeClosed(long startInclusive, long endInclusive)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendInclusive
(inclusive) by an incremental step of1
. Parameters:
startInclusive
 the (inclusive) initial valueendInclusive
 the inclusive upper bound Returns:
 a sequential
LongStreamEx
for the range oflong
elements  See Also:
LongStream.rangeClosed(long, long)

rangeClosed
public static LongStreamEx rangeClosed(long startInclusive, long endInclusive, long step)
Returns a sequential orderedLongStreamEx
fromstartInclusive
(inclusive) toendInclusive
(inclusive) by the specified incremental step. The negative step values are also supported. In this case, thestartInclusive
should be not less thanendInclusive
.Note that depending on the step value the
endInclusive
bound may still not be reached. For exampleLongStreamEx.rangeClosed(0, 5, 2)
will yield the stream of three numbers: 0L, 2L and 4L. Parameters:
startInclusive
 the (inclusive) initial valueendInclusive
 the inclusive upper (for positive step) or lower (for negative step) boundstep
 the nonzero value which designates the difference between the consecutive values of the resulting stream. Returns:
 a sequential
LongStreamEx
for the range oflong
elements; an empty stream if startInclusive is greater than endInclusive for positive step, or if startInclusive is less than endInclusive for negative step.  Throws:
IllegalArgumentException
 if step is zero Since:
 0.4.0
 See Also:
rangeClosed(long, long)

constant
public static LongStreamEx constant(long value, long length)
Returns a sequential unorderedLongStreamEx
of given length which elements are equal to supplied value. Parameters:
value
 the constant valuelength
 the length of the stream Returns:
 a new
LongStreamEx
 Since:
 0.1.2

zip
public static LongStreamEx zip(long[] first, long[] second, LongBinaryOperator mapper)
Returns a sequentialLongStreamEx
containing the results of applying the given function to the corresponding pairs of values in given two arrays. Parameters:
first
 the first arraysecond
 the second arraymapper
 a noninterfering, stateless function to apply to each pair of the corresponding array elements. Returns:
 a new
LongStreamEx
 Throws:
IllegalArgumentException
 if length of the arrays differs. Since:
 0.2.1

spliterator
public SPLTR spliterator()
 Specified by:
spliterator
in interfaceBaseStream<T,S extends BaseStream<T,S>>

isParallel
public boolean isParallel()
 Specified by:
isParallel
in interfaceBaseStream<T,S extends BaseStream<T,S>>

close
public void close()
 Specified by:
close
in interfaceAutoCloseable
 Specified by:
close
in interfaceBaseStream<T,S extends BaseStream<T,S>>

