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<div class="subTitle">org.jgrapht.alg</div>
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<h2 title="Class FloydWarshallShortestPaths" class="title">Class FloydWarshallShortestPaths<V,E></h2>
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<pre>public class <span class="strong">FloydWarshallShortestPaths<V,E></span>
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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>
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<div class="block">The <a href="http://en.wikipedia.org/wiki/Floyd-Warshall_algorithm">
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Floyd-Warshall algorithm</a> finds all shortest paths (all n^2 of them) in
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O(n^3) time. It can also calculate the graph diameter. Note that during
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construction time, no computations are performed! All computations are
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performed the first time one of the member methods of this class is invoked.
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The results are stored, so all subsequent calls to the same method are
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computationally efficient. Warning: This code has not been tested (and
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probably doesn't work) on multi-graphs. Code should be updated to work
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properly on multi-graphs.</div>
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<dl><dt><span class="strong">Author:</span></dt>
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<dd>Tom Larkworthy, Soren Davidsen (soren@tanesha.net), Joris Kinable</dd></dl>
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<td class="colOne"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#FloydWarshallShortestPaths(org.jgrapht.Graph)">FloydWarshallShortestPaths</a></strong>(<a href="../../../org/jgrapht/Graph.html" title="interface in org.jgrapht">Graph</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>> graph)</code> </td>
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<td class="colFirst"><code>double</code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#getDiameter()">getDiameter</a></strong>()</code> </td>
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<td class="colFirst"><code><a href="../../../org/jgrapht/Graph.html" title="interface in org.jgrapht">Graph</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#getGraph()">getGraph</a></strong>()</code> </td>
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<td class="colFirst"><code><a href="../../../org/jgrapht/GraphPath.html" title="interface in org.jgrapht">GraphPath</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#getShortestPath(V,%20V)">getShortestPath</a></strong>(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> a,
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<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> b)</code>
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<div class="block">Get the shortest path between two vertices.</div>
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</td>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#getShortestPathAsVertexList(V,%20V)">getShortestPathAsVertexList</a></strong>(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> a,
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<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> b)</code> </td>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/GraphPath.html" title="interface in org.jgrapht">GraphPath</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#getShortestPaths()">getShortestPaths</a></strong>()</code>
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<div class="block">Get all shortest paths in the graph.</div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/GraphPath.html" title="interface in org.jgrapht">GraphPath</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#getShortestPaths(V)">getShortestPaths</a></strong>(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> v)</code>
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<div class="block">Get shortest paths from a vertex to all other vertices in the graph.</div>
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#getShortestPathsCount()">getShortestPathsCount</a></strong>()</code> </td>
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<td class="colFirst"><code>double</code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html#shortestDistance(V,%20V)">shortestDistance</a></strong>(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> a,
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<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> b)</code>
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<div class="block">Get the length of a shortest path.</div>
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<h3>Constructor Detail</h3>
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<a name="FloydWarshallShortestPaths(org.jgrapht.Graph)">
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<h4>FloydWarshallShortestPaths</h4>
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<pre>public FloydWarshallShortestPaths(<a href="../../../org/jgrapht/Graph.html" title="interface in org.jgrapht">Graph</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>> graph)</pre>
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<h4>getGraph</h4>
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<pre>public <a href="../../../org/jgrapht/Graph.html" title="interface in org.jgrapht">Graph</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>> getGraph()</pre>
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<dl><dt><span class="strong">Returns:</span></dt><dd>the graph on which this algorithm operates</dd></dl>
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</li>
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<a name="getShortestPathsCount()">
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<h4>getShortestPathsCount</h4>
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<pre>public int getShortestPathsCount()</pre>
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<dl><dt><span class="strong">Returns:</span></dt><dd>total number of shortest paths</dd></dl>
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<a name="shortestDistance(java.lang.Object,java.lang.Object)">
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<h4>shortestDistance</h4>
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<pre>public double shortestDistance(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> a,
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<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> b)</pre>
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<div class="block">Get the length of a shortest path.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - first vertex</dd><dd><code>b</code> - second vertex</dd>
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<dt><span class="strong">Returns:</span></dt><dd>shortest distance between a and b</dd></dl>
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<h4>getDiameter</h4>
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<pre>public double getDiameter()</pre>
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<dl><dt><span class="strong">Returns:</span></dt><dd>the diameter (longest of all the shortest paths) computed for the
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graph. If the graph is vertexless, return 0.0.</dd></dl>
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<h4>getShortestPath</h4>
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<pre>public <a href="../../../org/jgrapht/GraphPath.html" title="interface in org.jgrapht">GraphPath</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>> getShortestPath(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> a,
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<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> b)</pre>
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<div class="block">Get the shortest path between two vertices.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - From vertice</dd><dd><code>b</code> - To vertice</dd>
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<dt><span class="strong">Returns:</span></dt><dd>the path, or null if none found</dd></dl>
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<a name="getShortestPathAsVertexList(java.lang.Object,java.lang.Object)">
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<h4>getShortestPathAsVertexList</h4>
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<pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>> getShortestPathAsVertexList(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> a,
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<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> b)</pre>
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<a name="getShortestPaths(java.lang.Object)">
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<h4>getShortestPaths</h4>
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<pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/GraphPath.html" title="interface in org.jgrapht">GraphPath</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>>> getShortestPaths(<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a> v)</pre>
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<div class="block">Get shortest paths from a vertex to all other vertices in the graph.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>v</code> - the originating vertex</dd>
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<dt><span class="strong">Returns:</span></dt><dd>List of paths</dd></dl>
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<a name="getShortestPaths()">
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<h4>getShortestPaths</h4>
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<pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/GraphPath.html" title="interface in org.jgrapht">GraphPath</a><<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">V</a>,<a href="../../../org/jgrapht/alg/FloydWarshallShortestPaths.html" title="type parameter in FloydWarshallShortestPaths">E</a>>> getShortestPaths()</pre>
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<div class="block">Get all shortest paths in the graph.</div>
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<dl><dt><span class="strong">Returns:</span></dt><dd>List of paths</dd></dl>
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</li>
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