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<div class="subTitle">org.jgrapht.alg</div>
<h2 title="Class CycleDetector" class="title">Class CycleDetector&lt;V,E&gt;</h2>
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<pre>public class <span class="strong">CycleDetector&lt;V,E&gt;</span>
extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">Performs cycle detection on a graph. The <i>inspected graph</i> is specified
at construction time and cannot be modified. Currently, the detector supports
only directed graphs.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>Sept 16, 2004</dd>
<dt><span class="strong">Author:</span></dt>
<dd>John V. Sichi</dd></dl>
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<td class="colOne"><code><strong><a href="../../../org/jgrapht/alg/CycleDetector.html#CycleDetector(org.jgrapht.DirectedGraph)">CycleDetector</a></strong>(<a href="../../../org/jgrapht/DirectedGraph.html" title="interface in org.jgrapht">DirectedGraph</a>&lt;<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>,<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">E</a>&gt;&nbsp;graph)</code>
<div class="block">Creates a cycle detector for the specified graph.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/CycleDetector.html#detectCycles()">detectCycles</a></strong>()</code>
<div class="block">Performs yes/no cycle detection on the entire graph.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/CycleDetector.html#detectCyclesContainingVertex(V)">detectCyclesContainingVertex</a></strong>(<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&nbsp;v)</code>
<div class="block">Performs yes/no cycle detection on an individual vertex.</div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/CycleDetector.html#findCycles()">findCycles</a></strong>()</code>
<div class="block">Finds the vertex set for the subgraph of all cycles.</div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/CycleDetector.html#findCyclesContainingVertex(V)">findCyclesContainingVertex</a></strong>(<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&nbsp;v)</code>
<div class="block">Finds the vertex set for the subgraph of all cycles which contain a
particular vertex.</div>
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<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li>
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<h4>CycleDetector</h4>
<pre>public&nbsp;CycleDetector(<a href="../../../org/jgrapht/DirectedGraph.html" title="interface in org.jgrapht">DirectedGraph</a>&lt;<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>,<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">E</a>&gt;&nbsp;graph)</pre>
<div class="block">Creates a cycle detector for the specified graph. Currently only directed
graphs are supported.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>graph</code> - the DirectedGraph in which to detect cycles</dd></dl>
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<pre>public&nbsp;boolean&nbsp;detectCycles()</pre>
<div class="block">Performs yes/no cycle detection on the entire graph.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>true iff the graph contains at least one cycle</dd></dl>
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<pre>public&nbsp;boolean&nbsp;detectCyclesContainingVertex(<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&nbsp;v)</pre>
<div class="block">Performs yes/no cycle detection on an individual vertex.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>v</code> - the vertex to test</dd>
<dt><span class="strong">Returns:</span></dt><dd>true if v is on at least one cycle</dd></dl>
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<h4>findCycles</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&gt;&nbsp;findCycles()</pre>
<div class="block">Finds the vertex set for the subgraph of all cycles.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>set of all vertices which participate in at least one cycle in
this graph</dd></dl>
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<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&gt;&nbsp;findCyclesContainingVertex(<a href="../../../org/jgrapht/alg/CycleDetector.html" title="type parameter in CycleDetector">V</a>&nbsp;v)</pre>
<div class="block">Finds the vertex set for the subgraph of all cycles which contain a
particular vertex.
<p>REVIEW jvs 25-Aug-2006: This implementation is not guaranteed to cover
all cases. If you want to be absolutely certain that you report vertices
from all cycles containing v, it's safer (but less efficient) to use
StrongConnectivityAlgorithm instead and return the strongly connected
component containing v.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>v</code> - the vertex to test</dd>
<dt><span class="strong">Returns:</span></dt><dd>set of all vertices reachable from v via at least one cycle</dd></dl>
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