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<div class="subTitle">edu.emory.mathcs.backport.java.util.concurrent</div>
<h2 title="Class LinkedBlockingDeque" class="title">Class LinkedBlockingDeque</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<ul class="inheritance">
<li>java.util.AbstractCollection</li>
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<ul class="inheritance">
<li><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractCollection.html" title="class in edu.emory.mathcs.backport.java.util">edu.emory.mathcs.backport.java.util.AbstractCollection</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html" title="class in edu.emory.mathcs.backport.java.util">edu.emory.mathcs.backport.java.util.AbstractQueue</a></li>
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<ul class="inheritance">
<li>edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingDeque</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a>, <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a>, <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a>, <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html" title="interface in edu.emory.mathcs.backport.java.util">Queue</a>, java.io.Serializable, java.lang.Iterable, java.util.Collection</dd>
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<pre>public class <span class="strong">LinkedBlockingDeque</span>
extends <a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html" title="class in edu.emory.mathcs.backport.java.util">AbstractQueue</a>
implements <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a>, java.io.Serializable</pre>
<div class="block">An optionally-bounded <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">blocking deque</a> based on
linked nodes.
<p> The optional capacity bound constructor argument serves as a
way to prevent excessive expansion. The capacity, if unspecified,
is equal to <code>Integer.MAX_VALUE</code>. Linked nodes are
dynamically created upon each insertion unless this would bring the
deque above capacity.
<p>Most operations run in constant time (ignoring time spent
blocking). Exceptions include <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#remove(java.lang.Object)"><code>remove</code></a>,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeFirstOccurrence(java.lang.Object)"><code>removeFirstOccurrence</code></a>, <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeLastOccurrence(java.lang.Object)"><code>removeLastOccurrence</code></a>, <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#contains(java.lang.Object)"><code>contains</code></a>, <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#iterator()"><code>iterator.remove()</code></a>, and the bulk
operations, all of which run in linear time.
<p>This class and its iterator implement all of the
<em>optional</em> methods of the <code>Collection</code> and <code>Iterator</code> interfaces.
<p>This class is a member of the
<a href="../../../../../../../../technotes/guides/collections/index.html">
Java Collections Framework</a>.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>1.6</dd>
<dt><span class="strong">Author:</span></dt>
<dd>Doug Lea</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../../serialized-form.html#edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingDeque">Serialized Form</a></dd></dl>
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<h3>Constructor Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#LinkedBlockingDeque()">LinkedBlockingDeque</a></strong>()</code>
<div class="block">Creates a <tt>LinkedBlockingDeque</tt> with a capacity of
<code>Integer.MAX_VALUE</code>.</div>
</td>
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<tr class="rowColor">
<td class="colOne"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#LinkedBlockingDeque(java.util.Collection)">LinkedBlockingDeque</a></strong>(java.util.Collection c)</code>
<div class="block">Creates a <tt>LinkedBlockingDeque</tt> with a capacity of
<code>Integer.MAX_VALUE</code>, initially containing the elements of
the given collection, added in traversal order of the
collection's iterator.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#LinkedBlockingDeque(int)">LinkedBlockingDeque</a></strong>(int capacity)</code>
<div class="block">Creates a <tt>LinkedBlockingDeque</tt> with the given (fixed) capacity.</div>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#add(java.lang.Object)">add</a></strong>(java.lang.Object e)</code>
<div class="block">Inserts the specified element at the end of this deque unless it would
violate capacity restrictions.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#addFirst(java.lang.Object)">addFirst</a></strong>(java.lang.Object e)</code>
<div class="block">Inserts the specified element at the front of this deque if it is
possible to do so immediately without violating capacity restrictions,
throwing an <tt>IllegalStateException</tt> if no space is currently
available.</div>
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<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#addLast(java.lang.Object)">addLast</a></strong>(java.lang.Object e)</code>
<div class="block">Inserts the specified element at the end of this deque if it is
possible to do so immediately without violating capacity restrictions,
throwing an <tt>IllegalStateException</tt> if no space is currently
available.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#clear()">clear</a></strong>()</code>
<div class="block">Atomically removes all of the elements from this deque.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#contains(java.lang.Object)">contains</a></strong>(java.lang.Object o)</code>
<div class="block">Returns <tt>true</tt> if this deque contains the specified element.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>java.util.Iterator</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#descendingIterator()">descendingIterator</a></strong>()</code>
<div class="block">Returns an iterator over the elements in this deque in reverse
sequential order.</div>
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<tr class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#drainTo(java.util.Collection)">drainTo</a></strong>(java.util.Collection c)</code>
<div class="block">Removes all available elements from this queue and adds them
to the given collection.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#drainTo(java.util.Collection, int)">drainTo</a></strong>(java.util.Collection c,
int maxElements)</code>
<div class="block">Removes at most the given number of available elements from
this queue and adds them to the given collection.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#element()">element</a></strong>()</code>
<div class="block">Retrieves, but does not remove, the head of the queue represented by
this deque.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#getFirst()">getFirst</a></strong>()</code>
<div class="block">Retrieves, but does not remove, the first element of this deque.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#getLast()">getLast</a></strong>()</code>
<div class="block">Retrieves, but does not remove, the last element of this deque.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.util.Iterator</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#iterator()">iterator</a></strong>()</code>
<div class="block">Returns an iterator over the elements in this deque in proper sequence.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#offer(java.lang.Object)">offer</a></strong>(java.lang.Object e)</code>
<div class="block">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
<tt>true</tt> upon success and <tt>false</tt> if no space is currently
available.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#offer(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">offer</a></strong>(java.lang.Object e,
long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)</code>
<div class="block">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.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#offerFirst(java.lang.Object)">offerFirst</a></strong>(java.lang.Object e)</code>
<div class="block">Inserts the specified element at the front of this deque if it is
possible to do so immediately without violating capacity restrictions,
returning <tt>true</tt> upon success and <tt>false</tt> if no space is
currently available.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#offerFirst(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">offerFirst</a></strong>(java.lang.Object e,
long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)</code>
<div class="block">Inserts the specified element at the front of this deque,
waiting up to the specified wait time if necessary for space to
become available.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#offerLast(java.lang.Object)">offerLast</a></strong>(java.lang.Object e)</code>
<div class="block">Inserts the specified element at the end of this deque if it is
possible to do so immediately without violating capacity restrictions,
returning <tt>true</tt> upon success and <tt>false</tt> if no space is
currently available.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#offerLast(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">offerLast</a></strong>(java.lang.Object e,
long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)</code>
<div class="block">Inserts the specified element at the end of this deque,
waiting up to the specified wait time if necessary for space to
become available.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#peek()">peek</a></strong>()</code>
<div class="block">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 <tt>null</tt> if this deque is empty.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#peekFirst()">peekFirst</a></strong>()</code>
<div class="block">Retrieves, but does not remove, the first element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#peekLast()">peekLast</a></strong>()</code>
<div class="block">Retrieves, but does not remove, the last element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#poll()">poll</a></strong>()</code>
<div class="block">Retrieves and removes the head of the queue represented by this deque
(in other words, the first element of this deque), or returns
<tt>null</tt> if this deque is empty.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#poll(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">poll</a></strong>(long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)</code>
<div class="block">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.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#pollFirst()">pollFirst</a></strong>()</code>
<div class="block">Retrieves and removes the first element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#pollFirst(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">pollFirst</a></strong>(long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)</code>
<div class="block">Retrieves and removes the first element of this deque, waiting
up to the specified wait time if necessary for an element to
become available.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#pollLast()">pollLast</a></strong>()</code>
<div class="block">Retrieves and removes the last element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#pollLast(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">pollLast</a></strong>(long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)</code>
<div class="block">Retrieves and removes the last element of this deque, waiting
up to the specified wait time if necessary for an element to
become available.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#pop()">pop</a></strong>()</code>
<div class="block">Pops an element from the stack represented by this deque.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#push(java.lang.Object)">push</a></strong>(java.lang.Object e)</code>
<div class="block">Pushes an element onto the stack represented by this deque.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#put(java.lang.Object)">put</a></strong>(java.lang.Object e)</code>
<div class="block">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.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#putFirst(java.lang.Object)">putFirst</a></strong>(java.lang.Object e)</code>
<div class="block">Inserts the specified element at the front of this deque,
waiting if necessary for space to become available.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#putLast(java.lang.Object)">putLast</a></strong>(java.lang.Object e)</code>
<div class="block">Inserts the specified element at the end of this deque,
waiting if necessary for space to become available.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#remainingCapacity()">remainingCapacity</a></strong>()</code>
<div class="block">Returns the number of additional elements that this deque can ideally
(in the absence of memory or resource constraints) accept without
blocking.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#remove()">remove</a></strong>()</code>
<div class="block">Retrieves and removes the head of the queue represented by this deque.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#remove(java.lang.Object)">remove</a></strong>(java.lang.Object o)</code>
<div class="block">Removes the first occurrence of the specified element from this deque.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeFirst()">removeFirst</a></strong>()</code>
<div class="block">Retrieves and removes the first element of this deque.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeFirstOccurrence(java.lang.Object)">removeFirstOccurrence</a></strong>(java.lang.Object o)</code>
<div class="block">Removes the first occurrence of the specified element from this deque.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeLast()">removeLast</a></strong>()</code>
<div class="block">Retrieves and removes the last element of this deque.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeLastOccurrence(java.lang.Object)">removeLastOccurrence</a></strong>(java.lang.Object o)</code>
<div class="block">Removes the last occurrence of the specified element from this deque.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#size()">size</a></strong>()</code>
<div class="block">Returns the number of elements in this deque.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#take()">take</a></strong>()</code>
<div class="block">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.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#takeFirst()">takeFirst</a></strong>()</code>
<div class="block">Retrieves and removes the first element of this deque, waiting
if necessary until an element becomes available.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#takeLast()">takeLast</a></strong>()</code>
<div class="block">Retrieves and removes the last element of this deque, waiting
if necessary until an element becomes available.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#toArray()">toArray</a></strong>()</code>
<div class="block">Returns an array containing all of the elements in this deque, in
proper sequence (from first to last element).</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Object[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#toArray(java.lang.Object[])">toArray</a></strong>(java.lang.Object[] a)</code>
<div class="block">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.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#toString()">toString</a></strong>()</code> </td>
</tr>
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<h3>Methods inherited from class edu.emory.mathcs.backport.java.util.<a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html" title="class in edu.emory.mathcs.backport.java.util">AbstractQueue</a></h3>
<code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html#addAll(java.util.Collection)">addAll</a></code></li>
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<h3>Methods inherited from class java.util.AbstractCollection</h3>
<code>containsAll, isEmpty, removeAll, retainAll</code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
</ul>
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<h3>Methods inherited from interface java.util.Collection</h3>
<code>addAll, containsAll, equals, hashCode, isEmpty, removeAll, retainAll</code></li>
</ul>
</li>
</ul>
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<h3>Constructor Detail</h3>
<a name="LinkedBlockingDeque()">
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<h4>LinkedBlockingDeque</h4>
<pre>public LinkedBlockingDeque()</pre>
<div class="block">Creates a <tt>LinkedBlockingDeque</tt> with a capacity of
<code>Integer.MAX_VALUE</code>.</div>
</li>
</ul>
<a name="LinkedBlockingDeque(int)">
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<h4>LinkedBlockingDeque</h4>
<pre>public LinkedBlockingDeque(int capacity)</pre>
<div class="block">Creates a <tt>LinkedBlockingDeque</tt> with the given (fixed) capacity.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>capacity</code> - the capacity of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if <tt>capacity</tt> is less than 1</dd></dl>
</li>
</ul>
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<h4>LinkedBlockingDeque</h4>
<pre>public LinkedBlockingDeque(java.util.Collection c)</pre>
<div class="block">Creates a <tt>LinkedBlockingDeque</tt> with a capacity of
<code>Integer.MAX_VALUE</code>, initially containing the elements of
the given collection, added in traversal order of the
collection's iterator.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - the collection of elements to initially contain</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified collection or any
of its elements are null</dd></dl>
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<h4>addFirst</h4>
<pre>public void addFirst(java.lang.Object e)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#addFirst(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the front of this deque if it is
possible to do so immediately without violating capacity restrictions,
throwing an <tt>IllegalStateException</tt> if no space is currently
available. When using a capacity-restricted deque, it is generally
preferable to use <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerFirst(java.lang.Object)"><code>offerFirst</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#addFirst(java.lang.Object)">addFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#addFirst(java.lang.Object)">addFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if the element cannot be added at this
time due to capacity restrictions</dd>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd></dl>
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<pre>public void addLast(java.lang.Object e)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#addLast(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the end of this deque if it is
possible to do so immediately without violating capacity restrictions,
throwing an <tt>IllegalStateException</tt> if no space is currently
available. When using a capacity-restricted deque, it is generally
preferable to use <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerLast(java.lang.Object)"><code>offerLast</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#addLast(java.lang.Object)">addLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#addLast(java.lang.Object)">addLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if the element cannot be added at this
time due to capacity restrictions</dd>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd></dl>
</li>
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<h4>offerFirst</h4>
<pre>public boolean offerFirst(java.lang.Object e)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerFirst(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the front of this deque if it is
possible to do so immediately without violating capacity restrictions,
returning <tt>true</tt> upon success and <tt>false</tt> if no space is
currently available.
When using a capacity-restricted deque, this method is generally
preferable to the <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#addFirst(java.lang.Object)"><code>addFirst</code></a> method, which can
fail to insert an element only by throwing an exception.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerFirst(java.lang.Object)">offerFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#offerFirst(java.lang.Object)">offerFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if the element was added to this deque, else
<tt>false</tt></dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd></dl>
</li>
</ul>
<a name="offerLast(java.lang.Object)">
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<pre>public boolean offerLast(java.lang.Object e)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerLast(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the end of this deque if it is
possible to do so immediately without violating capacity restrictions,
returning <tt>true</tt> upon success and <tt>false</tt> if no space is
currently available.
When using a capacity-restricted deque, this method is generally
preferable to the <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#addLast(java.lang.Object)"><code>addLast</code></a> method, which can
fail to insert an element only by throwing an exception.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerLast(java.lang.Object)">offerLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#offerLast(java.lang.Object)">offerLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if the element was added to this deque, else
<tt>false</tt></dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd></dl>
</li>
</ul>
<a name="putFirst(java.lang.Object)">
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<pre>public void putFirst(java.lang.Object e)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#putFirst(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the front of this deque,
waiting if necessary for space to become available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#putFirst(java.lang.Object)">putFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
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<pre>public void putLast(java.lang.Object e)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#putLast(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the end of this deque,
waiting if necessary for space to become available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#putLast(java.lang.Object)">putLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
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<pre>public boolean offerFirst(java.lang.Object e,
long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerFirst(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the front of this deque,
waiting up to the specified wait time if necessary for space to
become available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerFirst(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">offerFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd><dd><code>timeout</code> - how long to wait before giving up, in units of
<tt>unit</tt></dd><dd><code>unit</code> - a <tt>TimeUnit</tt> determining how to interpret the
<tt>timeout</tt> parameter</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if successful, or <tt>false</tt> if
the specified waiting time elapses before space is available</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
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<pre>public boolean offerLast(java.lang.Object e,
long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerLast(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">BlockingDeque</a></code></strong></div>
<div class="block">Inserts the specified element at the end of this deque,
waiting up to the specified wait time if necessary for space to
become available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerLast(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">offerLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd><dd><code>timeout</code> - how long to wait before giving up, in units of
<tt>unit</tt></dd><dd><code>unit</code> - a <tt>TimeUnit</tt> determining how to interpret the
<tt>timeout</tt> parameter</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if successful, or <tt>false</tt> if
the specified waiting time elapses before space is available</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
<a name="removeFirst()">
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<pre>public java.lang.Object removeFirst()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#removeFirst()">Deque</a></code></strong></div>
<div class="block">Retrieves and removes the first element of this deque. This method
differs from <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pollFirst()"><code>pollFirst</code></a> only in that it throws an
exception if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#removeFirst()">removeFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code></dd></dl>
</li>
</ul>
<a name="removeLast()">
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<pre>public java.lang.Object removeLast()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#removeLast()">Deque</a></code></strong></div>
<div class="block">Retrieves and removes the last element of this deque. This method
differs from <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pollLast()"><code>pollLast</code></a> only in that it throws an
exception if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#removeLast()">removeLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the tail of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code></dd></dl>
</li>
</ul>
<a name="pollFirst()">
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<pre>public java.lang.Object pollFirst()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pollFirst()">Deque</a></code></strong></div>
<div class="block">Retrieves and removes the first element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pollFirst()">pollFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque, or <tt>null</tt> if this deque is empty</dd></dl>
</li>
</ul>
<a name="pollLast()">
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<pre>public java.lang.Object pollLast()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pollLast()">Deque</a></code></strong></div>
<div class="block">Retrieves and removes the last element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pollLast()">pollLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the tail of this deque, or <tt>null</tt> if this deque is empty</dd></dl>
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<pre>public java.lang.Object takeFirst()
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#takeFirst()">BlockingDeque</a></code></strong></div>
<div class="block">Retrieves and removes the first element of this deque, waiting
if necessary until an element becomes available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#takeFirst()">takeFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
<a name="takeLast()">
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<pre>public java.lang.Object takeLast()
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#takeLast()">BlockingDeque</a></code></strong></div>
<div class="block">Retrieves and removes the last element of this deque, waiting
if necessary until an element becomes available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#takeLast()">takeLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the tail of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
<a name="pollFirst(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">
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<pre>public java.lang.Object pollFirst(long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#pollFirst(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">BlockingDeque</a></code></strong></div>
<div class="block">Retrieves and removes the first element of this deque, waiting
up to the specified wait time if necessary for an element to
become available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#pollFirst(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">pollFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>timeout</code> - how long to wait before giving up, in units of
<tt>unit</tt></dd><dd><code>unit</code> - a <tt>TimeUnit</tt> determining how to interpret the
<tt>timeout</tt> parameter</dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque, or <tt>null</tt> if the specified
waiting time elapses before an element is available</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
<a name="pollLast(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">
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<pre>public java.lang.Object pollLast(long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#pollLast(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">BlockingDeque</a></code></strong></div>
<div class="block">Retrieves and removes the last element of this deque, waiting
up to the specified wait time if necessary for an element to
become available.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#pollLast(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">pollLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>timeout</code> - how long to wait before giving up, in units of
<tt>unit</tt></dd><dd><code>unit</code> - a <tt>TimeUnit</tt> determining how to interpret the
<tt>timeout</tt> parameter</dd>
<dt><span class="strong">Returns:</span></dt><dd>the tail of this deque, or <tt>null</tt> if the specified
waiting time elapses before an element is available</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
<a name="getFirst()">
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</a>
<ul class="blockList">
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<h4>getFirst</h4>
<pre>public java.lang.Object getFirst()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#getFirst()">Deque</a></code></strong></div>
<div class="block">Retrieves, but does not remove, the first element of this deque.
This method differs from <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peekFirst()"><code>peekFirst</code></a> only in that it
throws an exception if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#getFirst()">getFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code></dd></dl>
</li>
</ul>
<a name="getLast()">
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</a>
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<h4>getLast</h4>
<pre>public java.lang.Object getLast()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#getLast()">Deque</a></code></strong></div>
<div class="block">Retrieves, but does not remove, the last element of this deque.
This method differs from <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peekLast()"><code>peekLast</code></a> only in that it
throws an exception if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#getLast()">getLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the tail of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code></dd></dl>
</li>
</ul>
<a name="peekFirst()">
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</a>
<ul class="blockList">
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<h4>peekFirst</h4>
<pre>public java.lang.Object peekFirst()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peekFirst()">Deque</a></code></strong></div>
<div class="block">Retrieves, but does not remove, the first element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peekFirst()">peekFirst</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque, or <tt>null</tt> if this deque is empty</dd></dl>
</li>
</ul>
<a name="peekLast()">
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<pre>public java.lang.Object peekLast()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peekLast()">Deque</a></code></strong></div>
<div class="block">Retrieves, but does not remove, the last element of this deque,
or returns <tt>null</tt> if this deque is empty.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peekLast()">peekLast</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the tail of this deque, or <tt>null</tt> if this deque is empty</dd></dl>
</li>
</ul>
<a name="removeFirstOccurrence(java.lang.Object)">
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<h4>removeFirstOccurrence</h4>
<pre>public boolean removeFirstOccurrence(java.lang.Object o)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#removeFirstOccurrence(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Removes the first occurrence of the specified element from this deque.
If the deque does not contain the element, it is unchanged.
More formally, removes the first element <tt>e</tt> such that
<tt>o.equals(e)</tt> (if such an element exists).
Returns <tt>true</tt> if this deque contained the specified element
(or equivalently, if this deque changed as a result of the call).</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#removeFirstOccurrence(java.lang.Object)">removeFirstOccurrence</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#removeFirstOccurrence(java.lang.Object)">removeFirstOccurrence</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>o</code> - element to be removed from this deque, if present</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if an element was removed as a result of this call</dd></dl>
</li>
</ul>
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<h4>removeLastOccurrence</h4>
<pre>public boolean removeLastOccurrence(java.lang.Object o)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#removeLastOccurrence(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Removes the last occurrence of the specified element from this deque.
If the deque does not contain the element, it is unchanged.
More formally, removes the last element <tt>e</tt> such that
<tt>o.equals(e)</tt> (if such an element exists).
Returns <tt>true</tt> if this deque contained the specified element
(or equivalently, if this deque changed as a result of the call).</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#removeLastOccurrence(java.lang.Object)">removeLastOccurrence</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#removeLastOccurrence(java.lang.Object)">removeLastOccurrence</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>o</code> - element to be removed from this deque, if present</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if an element was removed as a result of this call</dd></dl>
</li>
</ul>
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<h4>add</h4>
<pre>public boolean add(java.lang.Object e)</pre>
<div class="block">Inserts the specified element at the end of this deque unless it would
violate capacity restrictions. When using a capacity-restricted deque,
it is generally preferable to use method <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#offer(java.lang.Object)"><code>offer</code></a>.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#addLast(java.lang.Object)"><code>addLast(java.lang.Object)</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#add(java.lang.Object)">add</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#add(java.lang.Object)">add</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#add(java.lang.Object)">add</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html#add(java.lang.Object)">add</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html" title="interface in edu.emory.mathcs.backport.java.util">Queue</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>add</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html#add(java.lang.Object)">add</a></code> in class <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html" title="class in edu.emory.mathcs.backport.java.util">AbstractQueue</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> (as specified by <code>Collection.add(java.lang.Object)</code>)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if the element cannot be added at this
time due to capacity restrictions</dd>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd></dl>
</li>
</ul>
<a name="offer(java.lang.Object)">
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<h4>offer</h4>
<pre>public boolean offer(java.lang.Object e)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offer(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">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
<tt>true</tt> upon success and <tt>false</tt> if no space is currently
available. When using a capacity-restricted deque, this method is
generally preferable to the <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#add(java.lang.Object)"><code>BlockingDeque.add(java.lang.Object)</code></a> method, which can fail to
insert an element only by throwing an exception.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerLast(java.lang.Object)"><code>offerLast</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offer(java.lang.Object)">offer</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#offer(java.lang.Object)">offer</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#offer(java.lang.Object)">offer</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html#offer(java.lang.Object)">offer</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html" title="interface in edu.emory.mathcs.backport.java.util">Queue</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if the element was added to this queue, else
<tt>false</tt></dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd></dl>
</li>
</ul>
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<h4>put</h4>
<pre>public void put(java.lang.Object e)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#put(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">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.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#putLast(java.lang.Object)"><code>putLast</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#put(java.lang.Object)">put</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#put(java.lang.Object)">put</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
<a name="offer(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">
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<h4>offer</h4>
<pre>public boolean offer(java.lang.Object e,
long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offer(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">BlockingDeque</a></code></strong></div>
<div class="block">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.
<p>This method is equivalent to
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offerLast(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)"><code>offerLast</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#offer(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">offer</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#offer(java.lang.Object, long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">offer</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to add</dd><dd><code>timeout</code> - how long to wait before giving up, in units of
<tt>unit</tt></dd><dd><code>unit</code> - a <tt>TimeUnit</tt> determining how to interpret the
<tt>timeout</tt> parameter</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if the element was added to this deque, else
<tt>false</tt></dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
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<h4>remove</h4>
<pre>public java.lang.Object remove()</pre>
<div class="block">Retrieves and removes the head of the queue represented by this deque.
This method differs from <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#poll()"><code>poll</code></a> only in that it throws an
exception if this deque is empty.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeFirst()"><code>removeFirst</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#remove()">remove</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#remove()">remove</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html#remove()">remove</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html" title="interface in edu.emory.mathcs.backport.java.util">Queue</a></code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html#remove()">remove</a></code> in class <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html" title="class in edu.emory.mathcs.backport.java.util">AbstractQueue</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of the queue represented by this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code> - if this deque is empty</dd></dl>
</li>
</ul>
<a name="poll()">
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<h4>poll</h4>
<pre>public java.lang.Object poll()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#poll()">BlockingDeque</a></code></strong></div>
<div class="block">Retrieves and removes the head of the queue represented by this deque
(in other words, the first element of this deque), or returns
<tt>null</tt> if this deque is empty.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pollFirst()"><code>Deque.pollFirst()</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#poll()">poll</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#poll()">poll</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html#poll()">poll</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html" title="interface in edu.emory.mathcs.backport.java.util">Queue</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque, or <tt>null</tt> if this deque is empty</dd></dl>
</li>
</ul>
<a name="take()">
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<ul class="blockList">
<li class="blockList">
<h4>take</h4>
<pre>public java.lang.Object take()
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#take()">BlockingDeque</a></code></strong></div>
<div class="block">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.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#takeFirst()"><code>takeFirst</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#take()">take</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#take()">take</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
</ul>
<a name="poll(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">
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</a>
<ul class="blockList">
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<h4>poll</h4>
<pre>public java.lang.Object poll(long timeout,
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/TimeUnit.html" title="class in edu.emory.mathcs.backport.java.util.concurrent">TimeUnit</a> unit)
throws java.lang.InterruptedException</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#poll(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">BlockingDeque</a></code></strong></div>
<div class="block">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.
<p>This method is equivalent to
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#pollFirst(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)"><code>pollFirst</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#poll(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">poll</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#poll(long, edu.emory.mathcs.backport.java.util.concurrent.TimeUnit)">poll</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>timeout</code> - how long to wait before giving up, in units of
<tt>unit</tt></dd><dd><code>unit</code> - a <tt>TimeUnit</tt> determining how to interpret the
<tt>timeout</tt> parameter</dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque, or <tt>null</tt> if the
specified waiting time elapses before an element is available</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.InterruptedException</code> - if interrupted while waiting</dd></dl>
</li>
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<h4>element</h4>
<pre>public java.lang.Object element()</pre>
<div class="block">Retrieves, but does not remove, the head of the queue represented by
this deque. This method differs from <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#peek()"><code>peek</code></a> only in that
it throws an exception if this deque is empty.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#getFirst()"><code>getFirst</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#element()">element</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#element()">element</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html#element()">element</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html" title="interface in edu.emory.mathcs.backport.java.util">Queue</a></code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html#element()">element</a></code> in class <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html" title="class in edu.emory.mathcs.backport.java.util">AbstractQueue</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of the queue represented by this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code> - if this deque is empty</dd></dl>
</li>
</ul>
<a name="peek()">
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<h4>peek</h4>
<pre>public java.lang.Object peek()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#peek()">BlockingDeque</a></code></strong></div>
<div class="block">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 <tt>null</tt> if this deque is empty.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peekFirst()"><code>peekFirst</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#peek()">peek</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#peek()">peek</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html#peek()">peek</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Queue.html" title="interface in edu.emory.mathcs.backport.java.util">Queue</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the head of this deque, or <tt>null</tt> if this deque is empty</dd></dl>
</li>
</ul>
<a name="remainingCapacity()">
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<h4>remainingCapacity</h4>
<pre>public int remainingCapacity()</pre>
<div class="block">Returns the number of additional elements that this deque can ideally
(in the absence of memory or resource constraints) accept without
blocking. This is always equal to the initial capacity of this deque
less the current <tt>size</tt> of this deque.
<p>Note that you <em>cannot</em> always tell if an attempt to insert
an element will succeed by inspecting <tt>remainingCapacity</tt>
because it may be the case that another thread is about to
insert or remove an element.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#remainingCapacity()">remainingCapacity</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the remaining capacity</dd></dl>
</li>
</ul>
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<h4>drainTo</h4>
<pre>public int drainTo(java.util.Collection c)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#drainTo(java.util.Collection)">BlockingQueue</a></code></strong></div>
<div class="block">Removes all available elements from this queue and adds them
to the given collection. This operation may be more
efficient than repeatedly polling this queue. A failure
encountered while attempting to add elements to
collection <tt>c</tt> may result in elements being in neither,
either or both collections when the associated exception is
thrown. Attempts to drain a queue to itself result in
<tt>IllegalArgumentException</tt>. Further, the behavior of
this operation is undefined if the specified collection is
modified while the operation is in progress.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#drainTo(java.util.Collection)">drainTo</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - the collection to transfer elements into</dd>
<dt><span class="strong">Returns:</span></dt><dd>the number of elements transferred</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.UnsupportedOperationException</code> - if addition of elements
is not supported by the specified collection</dd>
<dd><code>java.lang.ClassCastException</code> - if the class of an element of this queue
prevents it from being added to the specified collection</dd>
<dd><code>java.lang.NullPointerException</code> - if the specified collection is null</dd>
<dd><code>java.lang.IllegalArgumentException</code> - if the specified collection is this
queue, or some property of an element of this queue prevents
it from being added to the specified collection</dd></dl>
</li>
</ul>
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<h4>drainTo</h4>
<pre>public int drainTo(java.util.Collection c,
int maxElements)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#drainTo(java.util.Collection, int)">BlockingQueue</a></code></strong></div>
<div class="block">Removes at most the given number of available elements from
this queue and adds them to the given collection. A failure
encountered while attempting to add elements to
collection <tt>c</tt> may result in elements being in neither,
either or both collections when the associated exception is
thrown. Attempts to drain a queue to itself result in
<tt>IllegalArgumentException</tt>. Further, the behavior of
this operation is undefined if the specified collection is
modified while the operation is in progress.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#drainTo(java.util.Collection, int)">drainTo</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - the collection to transfer elements into</dd><dd><code>maxElements</code> - the maximum number of elements to transfer</dd>
<dt><span class="strong">Returns:</span></dt><dd>the number of elements transferred</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.UnsupportedOperationException</code> - if addition of elements
is not supported by the specified collection</dd>
<dd><code>java.lang.ClassCastException</code> - if the class of an element of this queue
prevents it from being added to the specified collection</dd>
<dd><code>java.lang.NullPointerException</code> - if the specified collection is null</dd>
<dd><code>java.lang.IllegalArgumentException</code> - if the specified collection is this
queue, or some property of an element of this queue prevents
it from being added to the specified collection</dd></dl>
</li>
</ul>
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<h4>push</h4>
<pre>public void push(java.lang.Object e)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#push(java.lang.Object)">BlockingDeque</a></code></strong></div>
<div class="block">Pushes an element onto the stack represented by this deque. In other
words, inserts the element at the front of this deque unless it would
violate capacity restrictions.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#addFirst(java.lang.Object)"><code>addFirst</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#push(java.lang.Object)">push</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#push(java.lang.Object)">push</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - the element to push</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if the element cannot be added at this
time due to capacity restrictions</dd>
<dd><code>java.lang.NullPointerException</code> - if the specified element is null</dd></dl>
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<a name="pop()">
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<h4>pop</h4>
<pre>public java.lang.Object pop()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pop()">Deque</a></code></strong></div>
<div class="block">Pops an element from the stack represented by this deque. In other
words, removes and returns the first element of this deque.
<p>This method is equivalent to <a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#removeFirst()"><code>Deque.removeFirst()</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#pop()">pop</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the element at the front of this deque (which is the top
of the stack represented by this deque)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code></dd></dl>
</li>
</ul>
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<h4>remove</h4>
<pre>public boolean remove(java.lang.Object o)</pre>
<div class="block">Removes the first occurrence of the specified element from this deque.
If the deque does not contain the element, it is unchanged.
More formally, removes the first element <tt>e</tt> such that
<tt>o.equals(e)</tt> (if such an element exists).
Returns <tt>true</tt> if this deque contained the specified element
(or equivalently, if this deque changed as a result of the call).
<p>This method is equivalent to
<a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#removeFirstOccurrence(java.lang.Object)"><code>removeFirstOccurrence</code></a>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#remove(java.lang.Object)">remove</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#remove(java.lang.Object)">remove</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#remove(java.lang.Object)">remove</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>remove</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>remove</code> in class <code>java.util.AbstractCollection</code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>o</code> - element to be removed from this deque, if present</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this deque changed as a result of the call</dd></dl>
</li>
</ul>
<a name="size()">
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<h4>size</h4>
<pre>public int size()</pre>
<div class="block">Returns the number of elements in this deque.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#size()">size</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#size()">size</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>size</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>size</code> in class <code>java.util.AbstractCollection</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the number of elements in this deque</dd></dl>
</li>
</ul>
<a name="contains(java.lang.Object)">
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<h4>contains</h4>
<pre>public boolean contains(java.lang.Object o)</pre>
<div class="block">Returns <tt>true</tt> if this deque contains the specified element.
More formally, returns <tt>true</tt> if and only if this deque contains
at least one element <tt>e</tt> such that <tt>o.equals(e)</tt>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#contains(java.lang.Object)">contains</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html#contains(java.lang.Object)">contains</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingQueue</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#contains(java.lang.Object)">contains</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>contains</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>contains</code> in class <code>java.util.AbstractCollection</code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>o</code> - object to be checked for containment in this deque</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this deque contains the specified element</dd></dl>
</li>
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<h4>toArray</h4>
<pre>public java.lang.Object[] toArray()</pre>
<div class="block">Returns an array containing all of the elements in this deque, in
proper sequence (from first to last element).
<p>The returned array will be "safe" in that no references to it are
maintained by this deque. (In other words, this method must allocate
a new array). The caller is thus free to modify the returned array.
<p>This method acts as bridge between array-based and collection-based
APIs.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>toArray</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractCollection.html#toArray()">toArray</a></code> in class <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractCollection.html" title="class in edu.emory.mathcs.backport.java.util">AbstractCollection</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>an array containing all of the elements in this deque</dd></dl>
</li>
</ul>
<a name="toArray(java.lang.Object[])">
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<h4>toArray</h4>
<pre>public java.lang.Object[] toArray(java.lang.Object[] a)</pre>
<div class="block">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. If the deque fits in the specified array, it
is returned therein. Otherwise, a new array is allocated with the
runtime type of the specified array and the size of this deque.
<p>If this deque fits in the specified array with room to spare
(i.e., the array has more elements than this deque), the element in
the array immediately following the end of the deque is set to
<tt>null</tt>.
<p>Like the <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/LinkedBlockingDeque.html#toArray()"><code>toArray()</code></a> method, this method acts as bridge between
array-based and collection-based APIs. Further, this method allows
precise control over the runtime type of the output array, and may,
under certain circumstances, be used to save allocation costs.
<p>Suppose <tt>x</tt> is a deque known to contain only strings.
The following code can be used to dump the deque into a newly
allocated array of <tt>String</tt>:
<pre>
String[] y = x.toArray(new String[0]);</pre>
Note that <tt>toArray(new Object[0])</tt> is identical in function to
<tt>toArray()</tt>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>toArray</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractCollection.html#toArray(java.lang.Object[])">toArray</a></code> in class <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractCollection.html" title="class in edu.emory.mathcs.backport.java.util">AbstractCollection</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - the array into which the elements of the deque are to
be stored, if it is big enough; otherwise, a new array of the
same runtime type is allocated for this purpose</dd>
<dt><span class="strong">Returns:</span></dt><dd>an array containing all of the elements in this deque</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.ArrayStoreException</code> - if the runtime type of the specified array
is not a supertype of the runtime type of every element in
this deque</dd>
<dd><code>java.lang.NullPointerException</code> - if the specified array is null</dd></dl>
</li>
</ul>
<a name="toString()">
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<h4>toString</h4>
<pre>public java.lang.String toString()</pre>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code>toString</code> in class <code>java.util.AbstractCollection</code></dd>
</dl>
</li>
</ul>
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</a>
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<li class="blockList">
<h4>clear</h4>
<pre>public void clear()</pre>
<div class="block">Atomically removes all of the elements from this deque.
The deque will be empty after this call returns.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>clear</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html#clear()">clear</a></code> in class <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/AbstractQueue.html" title="class in edu.emory.mathcs.backport.java.util">AbstractQueue</a></code></dd>
</dl>
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<h4>iterator</h4>
<pre>public java.util.Iterator iterator()</pre>
<div class="block">Returns an iterator over the elements in this deque in proper sequence.
The elements will be returned in order from first (head) to last (tail).
The returned <tt>Iterator</tt> is a "weakly consistent" iterator that
will never throw <code>ConcurrentModificationException</code>,
and guarantees to traverse elements as they existed upon
construction of the iterator, and may (but is not guaranteed to)
reflect any modifications subsequent to construction.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html#iterator()">iterator</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/BlockingDeque.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent">BlockingDeque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#iterator()">iterator</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>iterator</code> in interface <code>java.lang.Iterable</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>iterator</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>iterator</code> in class <code>java.util.AbstractCollection</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>an iterator over the elements in this deque in proper sequence</dd></dl>
</li>
</ul>
<a name="descendingIterator()">
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<h4>descendingIterator</h4>
<pre>public java.util.Iterator descendingIterator()</pre>
<div class="block">Returns an iterator over the elements in this deque in reverse
sequential order. The elements will be returned in order from
last (tail) to first (head).
The returned <tt>Iterator</tt> is a "weakly consistent" iterator that
will never throw <code>ConcurrentModificationException</code>,
and guarantees to traverse elements as they existed upon
construction of the iterator, and may (but is not guaranteed to)
reflect any modifications subsequent to construction.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#descendingIterator()">descendingIterator</a></code> in interface <code><a href="../../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>an iterator over the elements in this deque in reverse
sequence</dd></dl>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
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