boolean add(E e)
Inserts the specified element at the end of this deque unless it would violate capacity restrictions.
void addFirst(E e)
Inserts the specified element at the front of this deque if it is possible to do so immediately without violating capacity restrictions, throwing an IllegalStateException if no space is currently available.
void addLast(E e)
Inserts the specified element at the end of this deque if it is possible to do so immediately without violating capacity restrictions, throwing an IllegalStateException if no space is currently available.
void clear()
Atomically removes all of the elements from this deque.
boolean contains(Object o)
Returns true if this deque contains the specified element.
Iterator<E> descendingIterator()
Returns an iterator over the elements in this deque in reverse sequential order.
int drainTo(Collection<? super E> c)
Removes all available elements from this queue and adds them to the given collection.
int drainTo(Collection<? super E> c, int maxElements)
Removes at most the given number of available elements from this queue and adds them to the given collection.
E element()
Retrieves, but does not remove, the head of the queue represented by this deque.
E getFirst()
Retrieves, but does not remove, the first element of this deque.
E getLast()
Retrieves, but does not remove, the last element of this deque.
Iterator<E> iterator()
Returns an iterator over the elements in this deque in proper sequence.
boolean offer(E e)
Inserts the specified element into the queue represented by this deque (in other words, at the tail of this deque) if it is possible to do so immediately without violating capacity restrictions, returning true upon success and false if no space is currently available.
boolean offer(E e, long timeout, TimeUnit unit)
Inserts the specified element into the queue represented by this deque (in other words, at the tail of this deque), waiting up to the specified wait time if necessary for space to become available.
boolean offerFirst(E e)
Inserts the specified element at the front of this deque if it is possible to do so immediately without violating capacity restrictions, returning true upon success and false if no space is currently available.
boolean offerFirst(E e, long timeout, TimeUnit unit)
Inserts the specified element at the front of this deque, waiting up to the specified wait time if necessary for space to become available.
boolean offerLast(E e)
Inserts the specified element at the end of this deque if it is possible to do so immediately without violating capacity restrictions, returning true upon success and false if no space is currently available.
boolean offerLast(E e, long timeout, TimeUnit unit)
Inserts the specified element at the end of this deque, waiting up to the specified wait time if necessary for space to become available.
E peek()
Retrieves, but does not remove, the head of the queue represented by this deque (in other words, the first element of this deque), or returns null if this deque is empty.
E peekFirst()
Retrieves, but does not remove, the first element of this deque, or returns null if this deque is empty.
E peekLast()
Retrieves, but does not remove, the last element of this deque, or returns null if this deque is empty.
E poll()
Retrieves and removes the head of the queue represented by this deque (in other words, the first element of this deque), or returns null if this deque is empty.
E poll(long timeout, TimeUnit unit)
Retrieves and removes the head of the queue represented by this deque (in other words, the first element of this deque), waiting up to the specified wait time if necessary for an element to become available.
E pollFirst()
Retrieves and removes the first element of this deque, or returns null if this deque is empty.
E pollFirst(long timeout, TimeUnit unit)
Retrieves and removes the first element of this deque, waiting up to the specified wait time if necessary for an element to become available.
E pollLast()
Retrieves and removes the last element of this deque, or returns null if this deque is empty.
E pollLast(long timeout, TimeUnit unit)
Retrieves and removes the last element of this deque, waiting up to the specified wait time if necessary for an element to become available.
E pop()
Pops an element from the stack represented by this deque.
void push(E e)
Pushes an element onto the stack represented by this deque (in other words, at the head of this deque) if it is possible to do so immediately without violating capacity restrictions, throwing an IllegalStateException if no space is currently available.
void put(E e)
Inserts the specified element into the queue represented by this deque (in other words, at the tail of this deque), waiting if necessary for space to become available.
void putFirst(E e)
Inserts the specified element at the front of this deque, waiting if necessary for space to become available.
void putLast(E e)
Inserts the specified element at the end of this deque, waiting if necessary for space to become available.
int remainingCapacity()
Returns the number of additional elements that this deque can ideally (in the absence of memory or resource constraints) accept without blocking.
E remove()
Retrieves and removes the head of the queue represented by this deque.
boolean remove(Object o)
Removes the first occurrence of the specified element from this deque.
E removeFirst()
Retrieves and removes the first element of this deque.
boolean removeFirstOccurrence(Object o)
Removes the first occurrence of the specified element from this deque.
E removeLast()
Retrieves and removes the last element of this deque.
boolean removeLastOccurrence(Object o)
Removes the last occurrence of the specified element from this deque.
int size()
Returns the number of elements in this deque.
Spliterator<E> spliterator() E take()
Retrieves and removes the head of the queue represented by this deque (in other words, the first element of this deque), waiting if necessary until an element becomes available.
E takeFirst()
Retrieves and removes the first element of this deque, waiting if necessary until an element becomes available.
E takeLast()
Retrieves and removes the last element of this deque, waiting if necessary until an element becomes available.
Object[] toArray()
Returns an array containing all of the elements in this deque, in proper sequence (from first to last element).
<T> T[] toArray(T[] a)
Returns an array containing all of the elements in this deque, in proper sequence; the runtime type of the returned array is that of the specified array.
String toString()
Returns a string representation of this collection.
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