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import java.io.Serializable; |
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import java.util.function.Consumer; |
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import java.util.stream.Stream; |
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import java.util.stream.Streams; |
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|
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/** |
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* Resizable-array implementation of the {@link Deque} interface. Array |
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* when used as a queue. |
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* |
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* <p>Most {@code ArrayDeque} operations run in amortized constant time. |
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< |
* Exceptions include {@link #remove(Object) remove}, {@link |
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< |
* #removeFirstOccurrence removeFirstOccurrence}, {@link #removeLastOccurrence |
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< |
* removeLastOccurrence}, {@link #contains contains}, {@link #iterator |
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* iterator.remove()}, and the bulk operations, all of which run in linear |
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* time. |
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* Exceptions include |
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> |
* {@link #remove(Object) remove}, |
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* {@link #removeFirstOccurrence removeFirstOccurrence}, |
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* {@link #removeLastOccurrence removeLastOccurrence}, |
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* {@link #contains contains}, |
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* {@link #iterator iterator.remove()}, |
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* and the bulk operations, all of which run in linear time. |
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* |
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< |
* <p>The iterators returned by this class's {@code iterator} method are |
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* <i>fail-fast</i>: If the deque is modified at any time after the iterator |
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* is created, in any way except through the iterator's own {@code remove} |
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* method, the iterator will generally throw a {@link |
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> |
* <p>The iterators returned by this class's {@link #iterator() iterator} |
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* method are <em>fail-fast</em>: If the deque is modified at any time after |
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* the iterator is created, in any way except through the iterator's own |
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* {@code remove} method, the iterator will generally throw a {@link |
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* ConcurrentModificationException}. Thus, in the face of concurrent |
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* modification, the iterator fails quickly and cleanly, rather than risking |
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* arbitrary, non-deterministic behavior at an undetermined time in the |
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} |
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} |
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|
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+ |
/** |
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* This class is nearly a mirror-image of DeqIterator, using tail |
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* instead of head for initial cursor, and head instead of tail |
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* for fence. |
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*/ |
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private class DescendingIterator implements Iterator<E> { |
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/* |
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* This class is nearly a mirror-image of DeqIterator, using |
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* tail instead of head for initial cursor, and head instead of |
| 618 |
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* tail for fence. |
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*/ |
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private int cursor = tail; |
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private int fence = head; |
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private int lastRet = -1; |
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elements[i] = s.readObject(); |
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} |
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|
| 848 |
< |
Spliterator<E> spliterator() { |
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> |
public Spliterator<E> spliterator() { |
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return new DeqSpliterator<E>(this, -1, -1); |
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} |
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|
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public Stream<E> stream() { |
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return Streams.stream(spliterator()); |
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} |
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|
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public Stream<E> parallelStream() { |
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return Streams.parallelStream(spliterator()); |
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} |
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|
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static final class DeqSpliterator<E> implements Spliterator<E> { |
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private final ArrayDeque<E> deq; |
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private int fence; // -1 until first use |
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return t; |
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} |
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|
| 873 |
< |
public DeqSpliterator<E> trySplit() { |
| 873 |
> |
public Spliterator<E> trySplit() { |
| 874 |
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int t = getFence(), h = index, n = deq.elements.length; |
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if (h != t && ((h + 1) & (n - 1)) != t) { |
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if (h > t) |
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return null; |
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} |
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|
| 884 |
< |
public void forEach(Consumer<? super E> consumer) { |
| 884 |
> |
public void forEachRemaining(Consumer<? super E> consumer) { |
| 885 |
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if (consumer == null) |
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throw new NullPointerException(); |
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Object[] a = deq.elements; |
