public final class StreamSupport extends Object
This class is mostly for library writers presenting stream views of data structures; most static stream methods intended for end users are in the various Stream
classes.
Modifier and Type | Method | Description |
---|---|---|
static DoubleStream |
doubleStream |
Creates a new sequential or parallel DoubleStream from a Supplier of Spliterator.OfDouble . |
static DoubleStream |
doubleStream |
Creates a new sequential or parallel DoubleStream from a Spliterator.OfDouble . |
static IntStream |
intStream |
Creates a new sequential or parallel IntStream from a Supplier of Spliterator.OfInt . |
static IntStream |
intStream |
Creates a new sequential or parallel IntStream from a Spliterator.OfInt . |
static LongStream |
longStream |
Creates a new sequential or parallel LongStream from a Supplier of Spliterator.OfLong . |
static LongStream |
longStream |
Creates a new sequential or parallel LongStream from a Spliterator.OfLong . |
static <T> Stream |
stream |
Creates a new sequential or parallel Stream from a Supplier of Spliterator . |
static <T> Stream |
stream |
Creates a new sequential or parallel Stream from a Spliterator . |
public static <T> Stream<T> stream(Spliterator<T> spliterator, boolean parallel)
Stream
from a Spliterator
. The spliterator is only traversed, split, or queried for estimated size after the terminal operation of the stream pipeline commences.
It is strongly recommended the spliterator report a characteristic of IMMUTABLE
or CONCURRENT
, or be late-binding. Otherwise, stream(java.util.function.Supplier, int, boolean)
should be used to reduce the scope of potential interference with the source. See Non-Interference for more details.
T
- the type of stream elementsspliterator
- a Spliterator
describing the stream elementsparallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.Stream
public static <T> Stream<T> stream(Supplier<? extends Spliterator<T>> supplier, int characteristics, boolean parallel)
Stream
from a Supplier
of Spliterator
. The Supplier.get()
method will be invoked on the supplier no more than once, and only after the terminal operation of the stream pipeline commences.
For spliterators that report a characteristic of IMMUTABLE
or CONCURRENT
, or that are late-binding, it is likely more efficient to use stream(java.util.Spliterator, boolean)
instead.
The use of a Supplier
in this form provides a level of indirection that reduces the scope of potential interference with the source. Since the supplier is only invoked after the terminal operation commences, any modifications to the source up to the start of the terminal operation are reflected in the stream result. See Non-Interference for more details.
T
- the type of stream elementssupplier
- a Supplier
of a Spliterator
characteristics
- Spliterator characteristics of the supplied Spliterator
. The characteristics must be equal to supplier.get().characteristics()
, otherwise undefined behavior may occur when terminal operation commences.parallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.Stream
public static IntStream intStream(Spliterator.OfInt spliterator, boolean parallel)
IntStream
from a Spliterator.OfInt
. The spliterator is only traversed, split, or queried for estimated size after the terminal operation of the stream pipeline commences.
It is strongly recommended the spliterator report a characteristic of IMMUTABLE
or CONCURRENT
, or be late-binding. Otherwise, intStream(java.util.function.Supplier, int, boolean)
should be used to reduce the scope of potential interference with the source. See Non-Interference for more details.
spliterator
- a Spliterator.OfInt
describing the stream elementsparallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.IntStream
public static IntStream intStream(Supplier<? extends Spliterator.OfInt> supplier, int characteristics, boolean parallel)
IntStream
from a Supplier
of Spliterator.OfInt
. The Supplier.get()
method will be invoked on the supplier no more than once, and only after the terminal operation of the stream pipeline commences.
For spliterators that report a characteristic of IMMUTABLE
or CONCURRENT
, or that are late-binding, it is likely more efficient to use intStream(java.util.Spliterator.OfInt, boolean)
instead.
The use of a Supplier
in this form provides a level of indirection that reduces the scope of potential interference with the source. Since the supplier is only invoked after the terminal operation commences, any modifications to the source up to the start of the terminal operation are reflected in the stream result. See Non-Interference for more details.
supplier
- a Supplier
of a Spliterator.OfInt
characteristics
- Spliterator characteristics of the supplied Spliterator.OfInt
. The characteristics must be equal to supplier.get().characteristics()
, otherwise undefined behavior may occur when terminal operation commences.parallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.IntStream
public static LongStream longStream(Spliterator.OfLong spliterator, boolean parallel)
LongStream
from a Spliterator.OfLong
. The spliterator is only traversed, split, or queried for estimated size after the terminal operation of the stream pipeline commences.
It is strongly recommended the spliterator report a characteristic of IMMUTABLE
or CONCURRENT
, or be late-binding. Otherwise, longStream(java.util.function.Supplier, int, boolean)
should be used to reduce the scope of potential interference with the source. See Non-Interference for more details.
spliterator
- a Spliterator.OfLong
describing the stream elementsparallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.LongStream
public static LongStream longStream(Supplier<? extends Spliterator.OfLong> supplier, int characteristics, boolean parallel)
LongStream
from a Supplier
of Spliterator.OfLong
. The Supplier.get()
method will be invoked on the supplier no more than once, and only after the terminal operation of the stream pipeline commences.
For spliterators that report a characteristic of IMMUTABLE
or CONCURRENT
, or that are late-binding, it is likely more efficient to use longStream(java.util.Spliterator.OfLong, boolean)
instead.
The use of a Supplier
in this form provides a level of indirection that reduces the scope of potential interference with the source. Since the supplier is only invoked after the terminal operation commences, any modifications to the source up to the start of the terminal operation are reflected in the stream result. See Non-Interference for more details.
supplier
- a Supplier
of a Spliterator.OfLong
characteristics
- Spliterator characteristics of the supplied Spliterator.OfLong
. The characteristics must be equal to supplier.get().characteristics()
, otherwise undefined behavior may occur when terminal operation commences.parallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.LongStream
public static DoubleStream doubleStream(Spliterator.OfDouble spliterator, boolean parallel)
DoubleStream
from a Spliterator.OfDouble
. The spliterator is only traversed, split, or queried for estimated size after the terminal operation of the stream pipeline commences.
It is strongly recommended the spliterator report a characteristic of IMMUTABLE
or CONCURRENT
, or be late-binding. Otherwise, doubleStream(java.util.function.Supplier, int, boolean)
should be used to reduce the scope of potential interference with the source. See Non-Interference for more details.
spliterator
- A Spliterator.OfDouble
describing the stream elementsparallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.DoubleStream
public static DoubleStream doubleStream(Supplier<? extends Spliterator.OfDouble> supplier, int characteristics, boolean parallel)
DoubleStream
from a Supplier
of Spliterator.OfDouble
. The Supplier.get()
method will be invoked on the supplier no more than once, and only after the terminal operation of the stream pipeline commences.
For spliterators that report a characteristic of IMMUTABLE
or CONCURRENT
, or that are late-binding, it is likely more efficient to use doubleStream(java.util.Spliterator.OfDouble, boolean)
instead.
The use of a Supplier
in this form provides a level of indirection that reduces the scope of potential interference with the source. Since the supplier is only invoked after the terminal operation commences, any modifications to the source up to the start of the terminal operation are reflected in the stream result. See Non-Interference for more details.
supplier
- A Supplier
of a Spliterator.OfDouble
characteristics
- Spliterator characteristics of the supplied Spliterator.OfDouble
. The characteristics must be equal to supplier.get().characteristics()
, otherwise undefined behavior may occur when terminal operation commences.parallel
- if true
then the returned stream is a parallel stream; if false
the returned stream is a sequential stream.DoubleStream
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