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 and Description |
|---|---|
static DoubleStream |
doubleStream(Spliterator.OfDouble spliterator,
boolean parallel)
Creates a new sequential or parallel
DoubleStream from a
Spliterator.OfDouble. |
static DoubleStream |
doubleStream(Supplier<? extends Spliterator.OfDouble> supplier,
int characteristics,
boolean parallel)
Creates a new sequential or parallel
DoubleStream from a
Supplier of Spliterator.OfDouble. |
static IntStream |
intStream(Spliterator.OfInt spliterator,
boolean parallel)
Creates a new sequential or parallel
IntStream from a
Spliterator.OfInt. |
static IntStream |
intStream(Supplier<? extends Spliterator.OfInt> supplier,
int characteristics,
boolean parallel)
Creates a new sequential or parallel
IntStream from a
Supplier of Spliterator.OfInt. |
static LongStream |
longStream(Spliterator.OfLong spliterator,
boolean parallel)
Creates a new sequential or parallel
LongStream from a
Spliterator.OfLong. |
static LongStream |
longStream(Supplier<? extends Spliterator.OfLong> supplier,
int characteristics,
boolean parallel)
Creates a new sequential or parallel
LongStream from a
Supplier of Spliterator.OfLong. |
static <T> Stream<T> |
stream(Spliterator<T> spliterator,
boolean parallel)
Creates a new sequential or parallel
Stream from a
Spliterator. |
static <T> Stream<T> |
stream(Supplier<? extends Spliterator<T>> supplier,
int characteristics,
boolean parallel)
Creates a new sequential or parallel
Stream from a
Supplier of 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.Streampublic 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 Spliteratorcharacteristics - 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.Streamstream(java.util.Spliterator, boolean)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.IntStreampublic 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.OfIntcharacteristics - 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.IntStreamintStream(java.util.Spliterator.OfInt, boolean)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.LongStreampublic 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.OfLongcharacteristics - 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.LongStreamlongStream(java.util.Spliterator.OfLong, boolean)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.DoubleStreampublic 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.OfDoublecharacteristics - 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.DoubleStreamdoubleStream(java.util.Spliterator.OfDouble, boolean) Submit a bug or feature
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.
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