Returns an iterator over the elements in this collection. There are no guarantees concerning the order in which the elements are returned (unless this collection is an instance of some class that provides a guarantee).
Creates a Spliterator over the elements in this collection.
Implementations should document characteristic values reported by the
spliterator. Such characteristic values are not required to be reported
if the spliterator reports Spliterator.SIZED and this collection
contains no elements.
The default implementation should be overridden by subclasses that
can return a more efficient spliterator. In order to
preserve expected laziness behavior for the stream() and
parallelStream()} methods, spliterators should either have the
characteristic of IMMUTABLE or CONCURRENT, or be
late-binding.
If none of these is practical, the overriding class should describe the
spliterator's documented policy of binding and structural interference,
and should override the stream() and parallelStream()
methods to create streams using a Supplier of the spliterator,
as in:
Stream<E> s = StreamSupport.stream(() -> spliterator(), spliteratorCharacteristics)
These requirements ensure that streams produced by the
stream() and parallelStream() methods will reflect the
contents of the collection as of initiation of the terminal stream
operation.
Spliterator over the elements in this collection
@implSpec
The default implementation creates a
late-binding spliterator
from the collections's Iterator. The spliterator inherits the
fail-fast properties of the collection's iterator.
The created Spliterator reports Spliterator.SIZED.
@implNote
The created Spliterator additionally reports
Spliterator.SUBSIZED.
If a spliterator covers no elements then the reporting of additional
characteristic values, beyond that of SIZED and SUBSIZED,
does not aid clients to control, specialize or simplify computation.
However, this does enable shared use of an immutable and empty
spliterator instance (see Spliterators.emptySpliterator()) for
empty collections, and enables clients to determine if such a spliterator
covers no elements.
Diagram: Collection List