Spliterator<Long>, Spliterator.OfLong, Spliterator.OfPrimitive<Long,LongConsumer,Spliterator.OfLong>public abstract static class Spliterators.AbstractLongSpliterator extends Object implements Spliterator.OfLong
Spliterator.OfLong that implements trySplit
to permit limited parallelism.
To implement a spliterator an extending class need only
implement Spliterator.OfLong.tryAdvance(java.util.function.LongConsumer)
tryAdvance}. The extending class should override
Spliterator.OfLong.forEachRemaining(java.util.function.LongConsumer) forEach} if it
can provide a more performant implementation.
Spliterators.spliterator(java.util.PrimitiveIterator.OfLong, long, int)Spliterator.OfDouble, Spliterator.OfInt, Spliterator.OfLong, Spliterator.OfPrimitive<T,T_CONS,T_SPLITR extends Spliterator.OfPrimitive<T,T_CONS,T_SPLITR>>CONCURRENT, DISTINCT, IMMUTABLE, NONNULL, ORDERED, SIZED, SORTED, SUBSIZED| 限定符 | 构造器 | 说明 |
|---|---|---|
protected |
AbstractLongSpliterator(long est,
int additionalCharacteristics) |
Creates a spliterator reporting the given estimated size and
characteristics.
|
| 限定符和类型 | 方法 | 说明 |
|---|---|---|
int |
characteristics() |
Returns a set of characteristics of this Spliterator and its
elements.
|
long |
estimateSize() |
Returns an estimate of the number of elements that would be
encountered by a
Spliterator.forEachRemaining(java.util.function.Consumer<? super T>) traversal, or returns Long#MAX_VALUE if infinite, unknown, or too expensive to compute. |
Spliterator.OfLong |
trySplit() |
If this spliterator can be partitioned, returns a Spliterator
covering elements, that will, upon return from this method, not
be covered by this Spliterator.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetComparator, getExactSizeIfKnown, hasCharacteristicsforEachRemaining, forEachRemaining, tryAdvance, tryAdvanceprotected AbstractLongSpliterator(long est,
int additionalCharacteristics)
est - the estimated size of this spliterator if known, otherwise
Long.MAX_VALUE.additionalCharacteristics - properties of this spliterator's
source or elements. If SIZED is reported then this
spliterator will additionally report SUBSIZED.public Spliterator.OfLong trySplit()
If this Spliterator is Spliterator.ORDERED, the returned Spliterator
must cover a strict prefix of the elements.
Unless this Spliterator covers an infinite number of elements,
repeated calls to trySplit() must eventually return null.
Upon non-null return:
estimateSize() before splitting,
must, after splitting, be greater than or equal to estimateSize()
for this and the returned Spliterator; andSUBSIZED, then estimateSize()
for this spliterator before splitting must be equal to the sum of
estimateSize() for this and the returned Spliterator after
splitting.This method may return null for any reason,
including emptiness, inability to split after traversal has
commenced, data structure constraints, and efficiency
considerations.
This implementation permits limited parallelism.
trySplit 在接口中 Spliterator<Long>trySplit 在接口中 Spliterator.OfLongtrySplit 在接口中 Spliterator.OfPrimitive<Long,LongConsumer,Spliterator.OfLong>Spliterator covering some portion of the
elements, or null if this spliterator cannot be splitpublic long estimateSize()
Spliterator.forEachRemaining(java.util.function.Consumer<? super T>) traversal, or returns Long#MAX_VALUE if infinite, unknown, or too expensive to compute.
If this Spliterator is Spliterator.SIZED and has not yet been partially
traversed or split, or this Spliterator is Spliterator.SUBSIZED and has
not yet been partially traversed, this estimate must be an accurate
count of elements that would be encountered by a complete traversal.
Otherwise, this estimate may be arbitrarily inaccurate, but must decrease
as specified across invocations of Spliterator.trySplit().
estimateSize 在接口中 Spliterator<Long>Long.MAX_VALUE if infinite,
unknown, or too expensive to compute.public int characteristics()
Spliterator.ORDERED, Spliterator.DISTINCT, Spliterator.SORTED, Spliterator.SIZED,
Spliterator.NONNULL, Spliterator.IMMUTABLE, Spliterator.CONCURRENT,
Spliterator.SUBSIZED. Repeated calls to characteristics() on
a given spliterator, prior to or in-between calls to trySplit,
should always return the same result.
If a Spliterator reports an inconsistent set of characteristics (either those returned from a single invocation or across multiple invocations), no guarantees can be made about any computation using this Spliterator.
characteristics 在接口中 Spliterator<Long>