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<div class="subTitle">org.apache.commons.collections.iterators</div>
<h2 title="Class SingletonListIterator" class="title">Class SingletonListIterator</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.apache.commons.collections.iterators.SingletonListIterator</li>
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<dt>All Implemented Interfaces:</dt>
<dd>java.util.Iterator, java.util.ListIterator</dd>
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<pre>public class <span class="strong">SingletonListIterator</span>
extends java.lang.Object
implements java.util.ListIterator</pre>
<div class="block"><p><code>SingletonIterator</code> is an <code>ListIterator</code> over a single
object instance.</p></div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>2.1</dd>
<dt><span class="strong">Version:</span></dt>
<dd>$Id: SingletonListIterator.java,v 1.2.2.1 2004/05/22 12:14:04 scolebourne Exp $</dd>
<dt><span class="strong">Author:</span></dt>
<dd><a href="mailto:scolebourne@joda.org">Stephen Colebourne</a></dd></dl>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#SingletonListIterator(java.lang.Object)">SingletonListIterator</a></strong>(java.lang.Object object)</code>
<div class="block">Constructs a new <Code>SingletonListIterator</Code>.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#add(java.lang.Object)">add</a></strong>(java.lang.Object obj)</code>
<div class="block">Add always throws <code>UnsupportedOperationException</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#hasNext()">hasNext</a></strong>()</code>
<div class="block">Is another object available from the iterator.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#hasPrevious()">hasPrevious</a></strong>()</code>
<div class="block">Is a previous object available from the iterator.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#next()">next</a></strong>()</code>
<div class="block">Get the next object from the iterator.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#nextIndex()">nextIndex</a></strong>()</code>
<div class="block">Returns the index of the element that would be returned by a subsequent
call to <tt>next</tt>.</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="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#previous()">previous</a></strong>()</code>
<div class="block">Get the previous object from the iterator.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#previousIndex()">previousIndex</a></strong>()</code>
<div class="block">Returns the index of the element that would be returned by a subsequent
call to <tt>previous</tt>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#remove()">remove</a></strong>()</code>
<div class="block">Remove always throws <code>UnsupportedOperationException</code>.</div>
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<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/collections/iterators/SingletonListIterator.html#set(java.lang.Object)">set</a></strong>(java.lang.Object obj)</code>
<div class="block">Set sets the value of the singleton.</div>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>SingletonListIterator</h4>
<pre>public SingletonListIterator(java.lang.Object object)</pre>
<div class="block">Constructs a new <Code>SingletonListIterator</Code>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>object</code> - the single object to return from the iterator</dd></dl>
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<h4>add</h4>
<pre>public void add(java.lang.Object obj)</pre>
<div class="block">Add always throws <code>UnsupportedOperationException</code>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>add</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.UnsupportedOperationException</code> - always</dd></dl>
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<a name="hasNext()">
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<h4>hasNext</h4>
<pre>public boolean hasNext()</pre>
<div class="block">Is another object available from the iterator.
<p>
This returns true if the single object hasn't been returned yet.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>hasNext</code> in interface <code>java.util.Iterator</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>hasNext</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>true if the single object hasn't been returned yet</dd></dl>
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<h4>hasPrevious</h4>
<pre>public boolean hasPrevious()</pre>
<div class="block">Is a previous object available from the iterator.
<p>
This returns true if the single object has been returned.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>hasPrevious</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>true if the single object has been returned</dd></dl>
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<h4>next</h4>
<pre>public java.lang.Object next()</pre>
<div class="block">Get the next object from the iterator.
<p>
This returns the single object if it hasn't been returned yet.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>next</code> in interface <code>java.util.Iterator</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>next</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the single object</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code> - if the single object has already
been returned</dd></dl>
</li>
</ul>
<a name="nextIndex()">
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<h4>nextIndex</h4>
<pre>public int nextIndex()</pre>
<div class="block">Returns the index of the element that would be returned by a subsequent
call to <tt>next</tt>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>nextIndex</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>0 or 1 depending on current state.</dd></dl>
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<h4>previous</h4>
<pre>public java.lang.Object previous()</pre>
<div class="block">Get the previous object from the iterator.
<p>
This returns the single object if it has been returned.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>previous</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the single object</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.util.NoSuchElementException</code> - if the single object has not already
been returned</dd></dl>
</li>
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<a name="previousIndex()">
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<h4>previousIndex</h4>
<pre>public int previousIndex()</pre>
<div class="block">Returns the index of the element that would be returned by a subsequent
call to <tt>previous</tt>. A return value of -1 indicates that the iterator is currently at
the start.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>previousIndex</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>0 or -1 depending on current state.</dd></dl>
</li>
</ul>
<a name="remove()">
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<h4>remove</h4>
<pre>public void remove()</pre>
<div class="block">Remove always throws <code>UnsupportedOperationException</code>.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>remove</code> in interface <code>java.util.Iterator</code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code>remove</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.UnsupportedOperationException</code> - always</dd></dl>
</li>
</ul>
<a name="set(java.lang.Object)">
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</a>
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<h4>set</h4>
<pre>public void set(java.lang.Object obj)</pre>
<div class="block">Set sets the value of the singleton.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code>set</code> in interface <code>java.util.ListIterator</code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>obj</code> - the object to set</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if <tt>next</tt> has not been called</dd></dl>
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