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<div class="subTitle">edu.emory.mathcs.backport.java.util</div>
<h2 title="Class LinkedList" class="title">Class LinkedList</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>java.util.AbstractList</li>
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<li>java.util.AbstractSequentialList</li>
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<li>edu.emory.mathcs.backport.java.util.LinkedList</li>
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<dt>All Implemented Interfaces:</dt>
<dd><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.Cloneable, java.lang.Iterable, java.util.Collection, java.util.List</dd>
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<pre>public class <span class="strong">LinkedList</span>
extends java.util.AbstractSequentialList
implements java.util.List, <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html" title="interface in edu.emory.mathcs.backport.java.util">Deque</a>, java.lang.Cloneable, java.io.Serializable</pre>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../serialized-form.html#edu.emory.mathcs.backport.java.util.LinkedList">Serialized Form</a></dd></dl>
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<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/LinkedList.html#LinkedList()">LinkedList</a></strong>()</code> </td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.html#LinkedList(java.util.Collection)">LinkedList</a></strong>(java.util.Collection c)</code> </td>
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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>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.html#add(int, java.lang.Object)">add</a></strong>(int index,
java.lang.Object element)</code> </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/LinkedList.html#add(java.lang.Object)">add</a></strong>(java.lang.Object o)</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 throwing an
<tt>IllegalStateException</tt> if no space is currently 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/LinkedList.html#addAll(java.util.Collection)">addAll</a></strong>(java.util.Collection c)</code> </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/LinkedList.html#addAll(int, java.util.Collection)">addAll</a></strong>(int index,
java.util.Collection c)</code> </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/LinkedList.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.</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/LinkedList.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.</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/LinkedList.html#clear()">clear</a></strong>()</code> </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/LinkedList.html#clone()">clone</a></strong>()</code> </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/LinkedList.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>
</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/LinkedList.html#descendingIterator()">descendingIterator</a></strong>()</code>
<div class="block">Returns an iterator over the elements in this deque in reverse
sequential order.</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/LinkedList.html#element()">element</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).</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/LinkedList.html#get(int)">get</a></strong>(int index)</code> </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/LinkedList.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="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.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="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.html#indexOf(java.lang.Object)">indexOf</a></strong>(java.lang.Object o)</code> </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/LinkedList.html#isEmpty()">isEmpty</a></strong>()</code> </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/LinkedList.html#lastIndexOf(java.lang.Object)">lastIndexOf</a></strong>(java.lang.Object o)</code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.util.ListIterator</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.html#listIterator()">listIterator</a></strong>()</code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.util.ListIterator</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.html#listIterator(int)">listIterator</a></strong>(int index)</code> </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/LinkedList.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="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.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 unless it would
violate capacity restrictions.</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/LinkedList.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 unless it would
violate capacity restrictions.</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/LinkedList.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/LinkedList.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/LinkedList.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/LinkedList.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/LinkedList.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="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.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/LinkedList.html#pop()">pop</a></strong>()</code>
<div class="block">Pops an element from 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/LinkedList.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 (in other
words, at the head of this deque) if it is possible to do so
immediately without violating capacity restrictions, returning
<tt>true</tt> upon success and throwing an
<tt>IllegalStateException</tt> if no space is currently 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/LinkedList.html#remove()">remove</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).</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/LinkedList.html#remove(int)">remove</a></strong>(int index)</code> </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/LinkedList.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>
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<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/LinkedList.html#removeFirst()">removeFirst</a></strong>()</code>
<div class="block">Retrieves and removes the first element of this deque.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../edu/emory/mathcs/backport/java/util/LinkedList.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>
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</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/LinkedList.html#removeLast()">removeLast</a></strong>()</code>
<div class="block">Retrieves and removes the last element of this deque.</div>
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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/LinkedList.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>
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<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/LinkedList.html#set(int, java.lang.Object)">set</a></strong>(int index,
java.lang.Object element)</code> </td>
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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/LinkedList.html#size()">size</a></strong>()</code>
<div class="block">Returns the number of elements in this deque.</div>
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<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/LinkedList.html#toArray()">toArray</a></strong>()</code> </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/LinkedList.html#toArray(java.lang.Object[])">toArray</a></strong>(java.lang.Object[] a)</code> </td>
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<code><a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#iterator()">iterator</a></code></li>
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<pre>public LinkedList(java.util.Collection c)</pre>
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<pre>public int size()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#size()">Deque</a></code></strong></div>
<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/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 interface <code>java.util.List</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>
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<pre>public boolean isEmpty()</pre>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>isEmpty</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>isEmpty</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>isEmpty</code> in class <code>java.util.AbstractCollection</code></dd>
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<pre>public boolean contains(java.lang.Object o)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#contains(java.lang.Object)">Deque</a></code></strong></div>
<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==null ? e==null : o.equals(e))</tt>.</div>
<dl>
<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>Specified by:</strong></dt>
<dd><code>contains</code> in interface <code>java.util.List</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> - element whose presence in this deque is to be tested</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this deque contains the specified element</dd></dl>
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<h4>indexOf</h4>
<pre>public int indexOf(java.lang.Object o)</pre>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>indexOf</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>indexOf</code> in class <code>java.util.AbstractList</code></dd>
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<pre>public int lastIndexOf(java.lang.Object o)</pre>
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<dt><strong>Specified by:</strong></dt>
<dd><code>lastIndexOf</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>lastIndexOf</code> in class <code>java.util.AbstractList</code></dd>
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<pre>public java.lang.Object[] toArray()</pre>
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<dt><strong>Specified by:</strong></dt>
<dd><code>toArray</code> in interface <code>java.util.Collection</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>toArray</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>toArray</code> in class <code>java.util.AbstractCollection</code></dd>
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<pre>public java.lang.Object[] toArray(java.lang.Object[] a)</pre>
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<dt><strong>Specified by:</strong></dt>
<dd><code>toArray</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>toArray</code> in class <code>java.util.AbstractCollection</code></dd>
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<pre>public boolean add(java.lang.Object o)</pre>
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<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 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/Deque.html#offer(java.lang.Object)"><code>offer</code></a>.
<p>This method is equivalent to <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#addLast(java.lang.Object)"><code>Deque.addLast(java.lang.Object)</code></a>.</div>
<dl>
<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>
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<dt><strong>Specified by:</strong></dt>
<dd><code>add</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>add</code> in class <code>java.util.AbstractList</code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>o</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></dl>
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<pre>public boolean remove(java.lang.Object o)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#remove(java.lang.Object)">Deque</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==null ? e==null : 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/Deque.html#removeFirstOccurrence(java.lang.Object)"><code>Deque.removeFirstOccurrence(java.lang.Object)</code></a>.</div>
<dl>
<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>Specified by:</strong></dt>
<dd><code>remove</code> in interface <code>java.util.List</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 an element was removed as a result of this call</dd></dl>
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<pre>public boolean addAll(java.util.Collection c)</pre>
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<dt><strong>Specified by:</strong></dt>
<dd><code>addAll</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>addAll</code> in class <code>java.util.AbstractCollection</code></dd>
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<pre>public boolean addAll(int index,
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<dt><strong>Overrides:</strong></dt>
<dd><code>addAll</code> in class <code>java.util.AbstractSequentialList</code></dd>
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<pre>public void clear()</pre>
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<dt><strong>Specified by:</strong></dt>
<dd><code>clear</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>clear</code> in class <code>java.util.AbstractList</code></dd>
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<pre>public java.lang.Object get(int index)</pre>
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<dt><strong>Overrides:</strong></dt>
<dd><code>get</code> in class <code>java.util.AbstractSequentialList</code></dd>
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<pre>public java.lang.Object set(int index,
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<dd><code>set</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>set</code> in class <code>java.util.AbstractSequentialList</code></dd>
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<pre>public void add(int index,
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<dt><strong>Specified by:</strong></dt>
<dd><code>add</code> in interface <code>java.util.List</code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code>add</code> in class <code>java.util.AbstractSequentialList</code></dd>
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<dt><strong>Overrides:</strong></dt>
<dd><code>remove</code> in class <code>java.util.AbstractSequentialList</code></dd>
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<pre>public java.util.ListIterator listIterator()</pre>
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<dt><strong>Overrides:</strong></dt>
<dd><code>listIterator</code> in class <code>java.util.AbstractList</code></dd>
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<pre>public java.util.ListIterator listIterator(int index)</pre>
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<dt><strong>Specified by:</strong></dt>
<dd><code>listIterator</code> in class <code>java.util.AbstractSequentialList</code></dd>
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<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/Deque.html#addFirst(java.lang.Object)">Deque</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.
When using a capacity-restricted deque, it is generally preferable to
use method <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#offerFirst(java.lang.Object)"><code>Deque.offerFirst(java.lang.Object)</code></a>.</div>
<dl>
<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></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/Deque.html#addLast(java.lang.Object)">Deque</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.
When using a capacity-restricted deque, it is generally preferable to
use method <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#offerLast(java.lang.Object)"><code>Deque.offerLast(java.lang.Object)</code></a>.
<p>This method is equivalent to <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#add(java.lang.Object)"><code>Deque.add(java.lang.Object)</code></a>.</div>
<dl>
<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></dl>
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<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/Deque.html#offerFirst(java.lang.Object)">Deque</a></code></strong></div>
<div class="block">Inserts the specified element at the front of this deque unless it would
violate capacity restrictions. When using a capacity-restricted deque,
this method is generally preferable to the <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#addFirst(java.lang.Object)"><code>Deque.addFirst(java.lang.Object)</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/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></dl>
</li>
</ul>
<a name="offerLast(java.lang.Object)">
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<h4>offerLast</h4>
<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/Deque.html#offerLast(java.lang.Object)">Deque</a></code></strong></div>
<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,
this method is generally preferable to the <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#addLast(java.lang.Object)"><code>Deque.addLast(java.lang.Object)</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/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></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></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></dl>
</li>
</ul>
<a name="pollFirst()">
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</a>
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<h4>pollFirst</h4>
<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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</a>
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<h4>pollLast</h4>
<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>
</li>
</ul>
<a name="getFirst()">
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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></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></dl>
</li>
</ul>
<a name="peekFirst()">
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</a>
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<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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</a>
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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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<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/Deque.html#removeFirstOccurrence(java.lang.Object)">Deque</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==null ? e==null : 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/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>
<a name="removeLastOccurrence(java.lang.Object)">
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</a>
<ul class="blockList">
<li class="blockList">
<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/Deque.html#removeLastOccurrence(java.lang.Object)">Deque</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==null ? e==null : 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/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>
<a name="offer(java.lang.Object)">
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</a>
<ul class="blockList">
<li class="blockList">
<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/Deque.html#offer(java.lang.Object)">Deque</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/Deque.html#add(java.lang.Object)"><code>Deque.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/Deque.html#offerLast(java.lang.Object)"><code>Deque.offerLast(java.lang.Object)</code></a>.</div>
<dl>
<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 deque, else
<tt>false</tt></dd></dl>
</li>
</ul>
<a name="remove()">
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<h4>remove</h4>
<pre>public java.lang.Object remove()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#remove()">Deque</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).
This method differs from <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.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/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#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><span class="strong">Returns:</span></dt><dd>the head of the queue represented by this deque</dd></dl>
</li>
</ul>
<a name="poll()">
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</a>
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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/Deque.html#poll()">Deque</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/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 first element of this deque, or <tt>null</tt> if
this deque is empty</dd></dl>
</li>
</ul>
<a name="element()">
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<h4>element</h4>
<pre>public java.lang.Object element()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#element()">Deque</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).
This method differs from <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.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/Deque.html#getFirst()"><code>Deque.getFirst()</code></a>.</div>
<dl>
<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><span class="strong">Returns:</span></dt><dd>the head of the queue represented by this deque</dd></dl>
</li>
</ul>
<a name="peek()">
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</a>
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<li class="blockList">
<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/Deque.html#peek()">Deque</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>Deque.peekFirst()</code></a>.</div>
<dl>
<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 the queue represented by this deque, or
<tt>null</tt> if this deque is empty</dd></dl>
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</ul>
<a name="push(java.lang.Object)">
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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/Deque.html#push(java.lang.Object)">Deque</a></code></strong></div>
<div class="block">Pushes an element onto the stack represented by this deque (in other
words, at the head of this deque) if it is possible to do so
immediately without violating capacity restrictions, returning
<tt>true</tt> upon success and throwing an
<tt>IllegalStateException</tt> if no space is currently available.
<p>This method is equivalent to <a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#addFirst(java.lang.Object)"><code>Deque.addFirst(java.lang.Object)</code></a>.</div>
<dl>
<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></dl>
</li>
</ul>
<a name="pop()">
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</a>
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<li class="blockList">
<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></dl>
</li>
</ul>
<a name="descendingIterator()">
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</a>
<ul class="blockList">
<li class="blockList">
<h4>descendingIterator</h4>
<pre>public java.util.Iterator descendingIterator()</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../../../../../edu/emory/mathcs/backport/java/util/Deque.html#descendingIterator()">Deque</a></code></strong></div>
<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).</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>
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<h4>clone</h4>
<pre>public java.lang.Object clone()</pre>
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<dt><strong>Overrides:</strong></dt>
<dd><code>clone</code> in class <code>java.lang.Object</code></dd>
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