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<h2 title="Class ChromaticNumber" class="title">Class ChromaticNumber</h2>
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<pre>public abstract class <span class="strong">ChromaticNumber</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">Allows the <a href="http://mathworld.wolfram.com/ChromaticNumber.html">
chromatic number</a> of a graph to be calculated. This is the minimal number
of colors needed to color each vertex such that no two adjacent vertices
share the same color. This algorithm will not find the true chromatic number,
since this is an NP-complete problem. So, a greedy algorithm will find an
approximate chromatic number.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>Dec 21, 2008</dd>
<dt><span class="strong">Author:</span></dt>
<dd>Andrew Newell</dd></dl>
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<td class="colOne"><code><strong><a href="../../../org/jgrapht/alg/ChromaticNumber.html#ChromaticNumber()">ChromaticNumber</a></strong>()</code> </td>
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<td class="colFirst"><code>static <V,E> int</code></td>
<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/ChromaticNumber.html#findGreedyChromaticNumber(org.jgrapht.UndirectedGraph)">findGreedyChromaticNumber</a></strong>(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</code>
<div class="block">Finds the number of colors required for a greedy coloring of the graph.</div>
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<td class="colFirst"><code>static <V,E> <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>,<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><V>></code></td>
<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/ChromaticNumber.html#findGreedyColoredGroups(org.jgrapht.UndirectedGraph)">findGreedyColoredGroups</a></strong>(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</code>
<div class="block">Finds a greedy coloring of the graph.</div>
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<pre>public ChromaticNumber()</pre>
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<pre>public static <V,E> int findGreedyChromaticNumber(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</pre>
<div class="block">Finds the number of colors required for a greedy coloring of the graph.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>g</code> - an undirected graph to find the chromatic number of</dd>
<dt><span class="strong">Returns:</span></dt><dd>integer the approximate chromatic number from the greedy
algorithm</dd></dl>
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<h4>findGreedyColoredGroups</h4>
<pre>public static <V,E> <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>,<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><V>> findGreedyColoredGroups(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</pre>
<div class="block">Finds a greedy coloring of the graph.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>g</code> - an undirected graph for which to find the coloring</dd></dl>
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