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<div class="subTitle">org.jgrapht</div>
<h2 title="Interface Graph" class="title">Interface Graph<V,E></h2>
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<dt>All Known Subinterfaces:</dt>
<dd><a href="../../org/jgrapht/DirectedGraph.html" title="interface in org.jgrapht">DirectedGraph</a><V,E>, <a href="../../org/jgrapht/ListenableGraph.html" title="interface in org.jgrapht">ListenableGraph</a><V,E>, <a href="../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E>, <a href="../../org/jgrapht/WeightedGraph.html" title="interface in org.jgrapht">WeightedGraph</a><V,E></dd>
</dl>
<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../org/jgrapht/graph/AbstractBaseGraph.html" title="class in org.jgrapht.graph">AbstractBaseGraph</a>, <a href="../../org/jgrapht/graph/AbstractGraph.html" title="class in org.jgrapht.graph">AbstractGraph</a>, <a href="../../org/jgrapht/graph/AsUndirectedGraph.html" title="class in org.jgrapht.graph">AsUndirectedGraph</a>, <a href="../../org/jgrapht/graph/AsUnweightedDirectedGraph.html" title="class in org.jgrapht.graph">AsUnweightedDirectedGraph</a>, <a href="../../org/jgrapht/graph/AsUnweightedGraph.html" title="class in org.jgrapht.graph">AsUnweightedGraph</a>, <a href="../../org/jgrapht/graph/AsWeightedDirectedGraph.html" title="class in org.jgrapht.graph">AsWeightedDirectedGraph</a>, <a href="../../org/jgrapht/graph/AsWeightedGraph.html" title="class in org.jgrapht.graph">AsWeightedGraph</a>, <a href="../../org/jgrapht/alg/BlockCutpointGraph.html" title="class in org.jgrapht.alg">BlockCutpointGraph</a>, <a href="../../org/jgrapht/graph/DefaultDirectedGraph.html" title="class in org.jgrapht.graph">DefaultDirectedGraph</a>, <a href="../../org/jgrapht/graph/DefaultDirectedWeightedGraph.html" title="class in org.jgrapht.graph">DefaultDirectedWeightedGraph</a>, <a href="../../org/jgrapht/graph/DefaultListenableGraph.html" title="class in org.jgrapht.graph">DefaultListenableGraph</a>, <a href="../../org/jgrapht/experimental/dag/DirectedAcyclicGraph.html" title="class in org.jgrapht.experimental.dag">DirectedAcyclicGraph</a>, <a href="../../org/jgrapht/graph/DirectedGraphUnion.html" title="class in org.jgrapht.graph">DirectedGraphUnion</a>, <a href="../../org/jgrapht/graph/DirectedMaskSubgraph.html" title="class in org.jgrapht.graph">DirectedMaskSubgraph</a>, <a href="../../org/jgrapht/graph/DirectedMultigraph.html" title="class in org.jgrapht.graph">DirectedMultigraph</a>, <a href="../../org/jgrapht/graph/DirectedPseudograph.html" title="class in org.jgrapht.graph">DirectedPseudograph</a>, <a href="../../org/jgrapht/graph/DirectedSubgraph.html" title="class in org.jgrapht.graph">DirectedSubgraph</a>, <a href="../../org/jgrapht/graph/DirectedWeightedMultigraph.html" title="class in org.jgrapht.graph">DirectedWeightedMultigraph</a>, <a href="../../org/jgrapht/graph/DirectedWeightedPseudograph.html" title="class in org.jgrapht.graph">DirectedWeightedPseudograph</a>, <a href="../../org/jgrapht/graph/DirectedWeightedSubgraph.html" title="class in org.jgrapht.graph">DirectedWeightedSubgraph</a>, <a href="../../org/jgrapht/graph/EdgeReversedGraph.html" title="class in org.jgrapht.graph">EdgeReversedGraph</a>, <a href="../../org/jgrapht/graph/GraphDelegator.html" title="class in org.jgrapht.graph">GraphDelegator</a>, <a href="../../org/jgrapht/experimental/GraphSquare.html" title="class in org.jgrapht.experimental">GraphSquare</a>, <a href="../../org/jgrapht/graph/GraphUnion.html" title="class in org.jgrapht.graph">GraphUnion</a>, <a href="../../org/jgrapht/graph/ListenableDirectedGraph.html" title="class in org.jgrapht.graph">ListenableDirectedGraph</a>, <a href="../../org/jgrapht/graph/ListenableDirectedWeightedGraph.html" title="class in org.jgrapht.graph">ListenableDirectedWeightedGraph</a>, <a href="../../org/jgrapht/graph/ListenableUndirectedGraph.html" title="class in org.jgrapht.graph">ListenableUndirectedGraph</a>, <a href="../../org/jgrapht/graph/ListenableUndirectedWeightedGraph.html" title="class in org.jgrapht.graph">ListenableUndirectedWeightedGraph</a>, <a href="../../org/jgrapht/graph/MaskSubgraph.html" title="class in org.jgrapht.graph">MaskSubgraph</a>, <a href="../../org/jgrapht/graph/MixedGraphUnion.html" title="class in org.jgrapht.graph">MixedGraphUnion</a>, <a href="../../org/jgrapht/graph/Multigraph.html" title="class in org.jgrapht.graph">Multigraph</a>, <a href="../../org/jgrapht/graph/ParanoidGraph.html" title="class in org.jgrapht.graph">ParanoidGraph</a>, <a href="../../org/jgrapht/graph/Pseudograph.html" title="class in org.jgrapht.graph">Pseudograph</a>, <a href="../../org/jgrapht/graph/SimpleDirectedGraph.html" title="class in org.jgrapht.graph">SimpleDirectedGraph</a>, <a href="../../org/jgrapht/graph/SimpleDirectedWeightedGraph.html" title="class in org.jgrapht.graph">SimpleDirectedWeightedGraph</a>, <a href="../../org/jgrapht/graph/SimpleGraph.html" title="class in org.jgrapht.graph">SimpleGraph</a>, <a href="../../org/jgrapht/graph/SimpleWeightedGraph.html" title="class in org.jgrapht.graph">SimpleWeightedGraph</a>, <a href="../../org/jgrapht/graph/Subgraph.html" title="class in org.jgrapht.graph">Subgraph</a>, <a href="../../org/jgrapht/graph/UndirectedGraphUnion.html" title="class in org.jgrapht.graph">UndirectedGraphUnion</a>, <a href="../../org/jgrapht/graph/UndirectedMaskSubgraph.html" title="class in org.jgrapht.graph">UndirectedMaskSubgraph</a>, <a href="../../org/jgrapht/graph/UndirectedSubgraph.html" title="class in org.jgrapht.graph">UndirectedSubgraph</a>, <a href="../../org/jgrapht/graph/UndirectedWeightedSubgraph.html" title="class in org.jgrapht.graph">UndirectedWeightedSubgraph</a>, <a href="../../org/jgrapht/graph/UnmodifiableDirectedGraph.html" title="class in org.jgrapht.graph">UnmodifiableDirectedGraph</a>, <a href="../../org/jgrapht/graph/UnmodifiableGraph.html" title="class in org.jgrapht.graph">UnmodifiableGraph</a>, <a href="../../org/jgrapht/graph/UnmodifiableUndirectedGraph.html" title="class in org.jgrapht.graph">UnmodifiableUndirectedGraph</a>, <a href="../../org/jgrapht/graph/WeightedMultigraph.html" title="class in org.jgrapht.graph">WeightedMultigraph</a>, <a href="../../org/jgrapht/graph/WeightedPseudograph.html" title="class in org.jgrapht.graph">WeightedPseudograph</a></dd>
</dl>
<hr>
<br>
<pre>public interface <span class="strong">Graph<V,E></span></pre>
<div class="block">The root interface in the graph hierarchy. A mathematical graph-theory graph
object <tt>G(V,E)</tt> contains a set <tt>V</tt> of vertices and a set <tt>
E</tt> of edges. Each edge e=(v1,v2) in E connects vertex v1 to vertex v2.
for more information about graphs and their related definitions see <a
href="http://mathworld.wolfram.com/Graph.html">
http://mathworld.wolfram.com/Graph.html</a>.
<p>This library generally follows the terminology found at: <a
href="http://mathworld.wolfram.com/topics/GraphTheory.html">
http://mathworld.wolfram.com/topics/GraphTheory.html</a>. Implementation of
this interface can provide simple-graphs, multigraphs, pseudographs etc. The
package <code>org.jgrapht.graph</code> provides a gallery of abstract and
concrete graph implementations.</p>
<p>This library works best when vertices represent arbitrary objects and
edges represent the relationships between them. Vertex and edge instances may
be shared by more than one graph.</p>
<p>Through generics, a graph can be typed to specific classes for vertices
<code>V</code> and edges <code>E<T></code>. Such a graph can contain
vertices of type <code>V</code> and all sub-types and Edges of type <code>
E</code> and all sub-types.</p>
<p>For guidelines on vertex and edge classes, see <a
href="https://github.com/jgrapht/jgrapht/wiki/EqualsAndHashCode">this wiki
page</a>.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>Jul 14, 2003</dd>
<dt><span class="strong">Author:</span></dt>
<dd>Barak Naveh</dd></dl>
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<h3>Method Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<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><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#addEdge(V,%20V)">addEdge</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</code>
<div class="block">Creates a new edge in this graph, going from the source vertex to the
target vertex, and returns the created edge.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#addEdge(V,%20V,%20E)">addEdge</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</code>
<div class="block">Adds the specified edge to this graph, going from the source vertex to
the target vertex.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#addVertex(V)">addVertex</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> v)</code>
<div class="block">Adds the specified vertex to this graph if not already present.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#containsEdge(E)">containsEdge</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</code>
<div class="block">Returns <tt>true</tt> if this graph contains the specified edge.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#containsEdge(V,%20V)">containsEdge</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</code>
<div class="block">Returns <tt>true</tt> if and only if this graph contains an edge going
from the source vertex to the target vertex.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#containsVertex(V)">containsVertex</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> v)</code>
<div class="block">Returns <tt>true</tt> if this graph contains the specified vertex.</div>
</td>
</tr>
<tr class="altColor">
<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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#edgeSet()">edgeSet</a></strong>()</code>
<div class="block">Returns a set of the edges contained in this graph.</div>
</td>
</tr>
<tr class="rowColor">
<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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#edgesOf(V)">edgesOf</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> vertex)</code>
<div class="block">Returns a set of all edges touching the specified vertex.</div>
</td>
</tr>
<tr class="altColor">
<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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#getAllEdges(V,%20V)">getAllEdges</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</code>
<div class="block">Returns a set of all edges connecting source vertex to target vertex if
such vertices exist in this graph.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#getEdge(V,%20V)">getEdge</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</code>
<div class="block">Returns an edge connecting source vertex to target vertex if such
vertices and such edge exist in this graph.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../org/jgrapht/EdgeFactory.html" title="interface in org.jgrapht">EdgeFactory</a><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a>,<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#getEdgeFactory()">getEdgeFactory</a></strong>()</code>
<div class="block">Returns the edge factory using which this graph creates new edges.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#getEdgeSource(E)">getEdgeSource</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</code>
<div class="block">Returns the source vertex of an edge.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#getEdgeTarget(E)">getEdgeTarget</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</code>
<div class="block">Returns the target vertex of an edge.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#getEdgeWeight(E)">getEdgeWeight</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</code>
<div class="block">Returns the weight assigned to a given edge.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#removeAllEdges(java.util.Collection)">removeAllEdges</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><? extends <a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>> edges)</code>
<div class="block">Removes all the edges in this graph that are also contained in the
specified edge collection.</div>
</td>
</tr>
<tr class="rowColor">
<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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#removeAllEdges(V,%20V)">removeAllEdges</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</code>
<div class="block">Removes all the edges going from the specified source vertex to the
specified target vertex, and returns a set of all removed edges.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#removeAllVertices(java.util.Collection)">removeAllVertices</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><? extends <a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a>> vertices)</code>
<div class="block">Removes all the vertices in this graph that are also contained in the
specified vertex collection.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#removeEdge(E)">removeEdge</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</code>
<div class="block">Removes the specified edge from the graph.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#removeEdge(V,%20V)">removeEdge</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</code>
<div class="block">Removes an edge going from source vertex to target vertex, if such
vertices and such edge exist in this graph.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#removeVertex(V)">removeVertex</a></strong>(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> v)</code>
<div class="block">Removes the specified vertex from this graph including all its touching
edges if present.</div>
</td>
</tr>
<tr class="altColor">
<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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a>></code></td>
<td class="colLast"><code><strong><a href="../../org/jgrapht/Graph.html#vertexSet()">vertexSet</a></strong>()</code>
<div class="block">Returns a set of the vertices contained in this graph.</div>
</td>
</tr>
</table>
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<h3>Method Detail</h3>
<a name="getAllEdges(java.lang.Object,java.lang.Object)">
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<h4>getAllEdges</h4>
<pre><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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>> getAllEdges(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</pre>
<div class="block">Returns a set of all edges connecting source vertex to target vertex if
such vertices exist in this graph. If any of the vertices does not exist
or is <code>null</code>, returns <code>null</code>. If both vertices
exist but no edges found, returns an empty set.
<p>In undirected graphs, some of the returned edges may have their source
and target vertices in the opposite order. In simple graphs the returned
set is either singleton set or empty set.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sourceVertex</code> - source vertex of the edge.</dd><dd><code>targetVertex</code> - target vertex of the edge.</dd>
<dt><span class="strong">Returns:</span></dt><dd>a set of all edges connecting source vertex to target vertex.</dd></dl>
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<pre><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> getEdge(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</pre>
<div class="block">Returns an edge connecting source vertex to target vertex if such
vertices and such edge exist in this graph. Otherwise returns <code>
null</code>. If any of the specified vertices is <code>null</code>
returns <code>null</code>
<p>In undirected graphs, the returned edge may have its source and target
vertices in the opposite order.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sourceVertex</code> - source vertex of the edge.</dd><dd><code>targetVertex</code> - target vertex of the edge.</dd>
<dt><span class="strong">Returns:</span></dt><dd>an edge connecting source vertex to target vertex.</dd></dl>
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<pre><a href="../../org/jgrapht/EdgeFactory.html" title="interface in org.jgrapht">EdgeFactory</a><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a>,<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>> getEdgeFactory()</pre>
<div class="block">Returns the edge factory using which this graph creates new edges. The
edge factory is defined when the graph is constructed and must not be
modified.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>the edge factory using which this graph creates new edges.</dd></dl>
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<pre><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> addEdge(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</pre>
<div class="block">Creates a new edge in this graph, going from the source vertex to the
target vertex, and returns the created edge. Some graphs do not allow
edge-multiplicity. In such cases, if the graph already contains an edge
from the specified source to the specified target, than this method does
not change the graph and returns <code>null</code>.
<p>The source and target vertices must already be contained in this
graph. If they are not found in graph IllegalArgumentException is
thrown.</p>
<p>This method creates the new edge <code>e</code> using this graph's
<code>EdgeFactory</code>. For the new edge to be added <code>e</code>
must <i>not</i> be equal to any other edge the graph (even if the graph
allows edge-multiplicity). More formally, the graph must not contain any
edge <code>e2</code> such that <code>e2.equals(e)</code>. If such <code>
e2</code> is found then the newly created edge <code>e</code> is
abandoned, the method leaves this graph unchanged returns <code>
null</code>.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sourceVertex</code> - source vertex of the edge.</dd><dd><code>targetVertex</code> - target vertex of the edge.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The newly created edge if added to the graph, otherwise <code>
null</code>.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if source or target vertices are not
found in the graph.</dd>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if any of the specified vertices is <code>
null</code>.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../org/jgrapht/Graph.html#getEdgeFactory()"><code>getEdgeFactory()</code></a></dd></dl>
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<pre>boolean addEdge(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</pre>
<div class="block">Adds the specified edge to this graph, going from the source vertex to
the target vertex. More formally, adds the specified edge, <code>
e</code>, to this graph if this graph contains no edge <code>e2</code>
such that <code>e2.equals(e)</code>. If this graph already contains such
an edge, the call leaves this graph unchanged and returns <tt>false</tt>.
Some graphs do not allow edge-multiplicity. In such cases, if the graph
already contains an edge from the specified source to the specified
target, than this method does not change the graph and returns <code>
false</code>. If the edge was added to the graph, returns <code>
true</code>.
<p>The source and target vertices must already be contained in this
graph. If they are not found in graph IllegalArgumentException is
thrown.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sourceVertex</code> - source vertex of the edge.</dd><dd><code>targetVertex</code> - target vertex of the edge.</dd><dd><code>e</code> - edge to be added to this graph.</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this graph did not already contain the specified
edge.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if source or target vertices are not
found in the graph.</dd>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang">ClassCastException</a></code> - if the specified edge is not assignment
compatible with the class of edges produced by the edge factory of this
graph.</dd>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if any of the specified vertices is <code>
null</code>.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../org/jgrapht/Graph.html#addEdge(V,%20V)"><code>addEdge(Object, Object)</code></a>,
<a href="../../org/jgrapht/Graph.html#getEdgeFactory()"><code>getEdgeFactory()</code></a></dd></dl>
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<pre>boolean addVertex(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> v)</pre>
<div class="block">Adds the specified vertex to this graph if not already present. More
formally, adds the specified vertex, <code>v</code>, to this graph if
this graph contains no vertex <code>u</code> such that <code>
u.equals(v)</code>. If this graph already contains such vertex, the call
leaves this graph unchanged and returns <tt>false</tt>. In combination
with the restriction on constructors, this ensures that graphs never
contain duplicate vertices.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>v</code> - vertex to be added to this graph.</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this graph did not already contain the specified
vertex.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the specified vertex is <code>
null</code>.</dd></dl>
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<pre>boolean containsEdge(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</pre>
<div class="block">Returns <tt>true</tt> if and only if this graph contains an edge going
from the source vertex to the target vertex. In undirected graphs the
same result is obtained when source and target are inverted. If any of
the specified vertices does not exist in the graph, or if is <code>
null</code>, returns <code>false</code>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sourceVertex</code> - source vertex of the edge.</dd><dd><code>targetVertex</code> - target vertex of the edge.</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this graph contains the specified edge.</dd></dl>
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<pre>boolean containsEdge(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</pre>
<div class="block">Returns <tt>true</tt> if this graph contains the specified edge. More
formally, returns <tt>true</tt> if and only if this graph contains an
edge <code>e2</code> such that <code>e.equals(e2)</code>. If the
specified edge is <code>null</code> returns <code>false</code>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - edge whose presence in this graph is to be tested.</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this graph contains the specified edge.</dd></dl>
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<pre>boolean containsVertex(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> v)</pre>
<div class="block">Returns <tt>true</tt> if this graph contains the specified vertex. More
formally, returns <tt>true</tt> if and only if this graph contains a
vertex <code>u</code> such that <code>u.equals(v)</code>. If the
specified vertex is <code>null</code> returns <code>false</code>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>v</code> - vertex whose presence in this graph is to be tested.</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this graph contains the specified vertex.</dd></dl>
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<pre><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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>> edgeSet()</pre>
<div class="block">Returns a set of the edges contained in this graph. The set is backed by
the graph, so changes to the graph are reflected in the set. If the graph
is modified while an iteration over the set is in progress, the results
of the iteration are undefined.
<p>The graph implementation may maintain a particular set ordering (e.g.
via <a href="http://docs.oracle.com/javase/7/docs/api/java/util/LinkedHashSet.html?is-external=true" title="class or interface in java.util"><code>LinkedHashSet</code></a>) for deterministic iteration, but
this is not required. It is the responsibility of callers who rely on
this behavior to only use graph implementations which support it.</p></div>
<dl><dt><span class="strong">Returns:</span></dt><dd>a set of the edges contained in this graph.</dd></dl>
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<pre><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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>> edgesOf(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> vertex)</pre>
<div class="block">Returns a set of all edges touching the specified vertex. If no edges are
touching the specified vertex returns an empty set.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>vertex</code> - the vertex for which a set of touching edges is to be
returned.</dd>
<dt><span class="strong">Returns:</span></dt><dd>a set of all edges touching the specified vertex.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if vertex is not found in the graph.</dd>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if vertex is <code>null</code>.</dd></dl>
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<pre>boolean removeAllEdges(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><? extends <a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>> edges)</pre>
<div class="block">Removes all the edges in this graph that are also contained in the
specified edge collection. After this call returns, this graph will
contain no edges in common with the specified edges. This method will
invoke the <a href="../../org/jgrapht/Graph.html#removeEdge(E)"><code>removeEdge(Object)</code></a> method.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>edges</code> - edges to be removed from this graph.</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this graph changed as a result of the call</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the specified edge collection is <tt>
null</tt>.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../org/jgrapht/Graph.html#removeEdge(E)"><code>removeEdge(Object)</code></a>,
<a href="../../org/jgrapht/Graph.html#containsEdge(E)"><code>containsEdge(Object)</code></a></dd></dl>
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<pre><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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a>> removeAllEdges(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</pre>
<div class="block">Removes all the edges going from the specified source vertex to the
specified target vertex, and returns a set of all removed edges. Returns
<code>null</code> if any of the specified vertices does not exist in the
graph. If both vertices exist but no edge is found, returns an empty set.
This method will either invoke the <a href="../../org/jgrapht/Graph.html#removeEdge(E)"><code>removeEdge(Object)</code></a> method, or
the <a href="../../org/jgrapht/Graph.html#removeEdge(V,%20V)"><code>removeEdge(Object, Object)</code></a> method.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sourceVertex</code> - source vertex of the edge.</dd><dd><code>targetVertex</code> - target vertex of the edge.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the removed edges, or <code>null</code> if either vertex is not
part of graph</dd></dl>
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<pre>boolean removeAllVertices(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><? extends <a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a>> vertices)</pre>
<div class="block">Removes all the vertices in this graph that are also contained in the
specified vertex collection. After this call returns, this graph will
contain no vertices in common with the specified vertices. This method
will invoke the <a href="../../org/jgrapht/Graph.html#removeVertex(V)"><code>removeVertex(Object)</code></a> method.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>vertices</code> - vertices to be removed from this graph.</dd>
<dt><span class="strong">Returns:</span></dt><dd><tt>true</tt> if this graph changed as a result of the call</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the specified vertex collection is <tt>
null</tt>.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../org/jgrapht/Graph.html#removeVertex(V)"><code>removeVertex(Object)</code></a>,
<a href="../../org/jgrapht/Graph.html#containsVertex(V)"><code>containsVertex(Object)</code></a></dd></dl>
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<pre><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> removeEdge(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> sourceVertex,
<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> targetVertex)</pre>
<div class="block">Removes an edge going from source vertex to target vertex, if such
vertices and such edge exist in this graph. Returns the edge if removed
or <code>null</code> otherwise.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sourceVertex</code> - source vertex of the edge.</dd><dd><code>targetVertex</code> - target vertex of the edge.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The removed edge, or <code>null</code> if no edge removed.</dd></dl>
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<pre>boolean removeEdge(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</pre>
<div class="block">Removes the specified edge from the graph. Removes the specified edge
from this graph if it is present. More formally, removes an edge <code>
e2</code> such that <code>e2.equals(e)</code>, if the graph contains such
edge. Returns <tt>true</tt> if the graph contained the specified edge.
(The graph will not contain the specified edge once the call returns).
<p>If the specified edge is <code>null</code> returns <code>
false</code>.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - edge to be removed from this graph, if present.</dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if and only if the graph contained the
specified edge.</dd></dl>
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<pre>boolean removeVertex(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> v)</pre>
<div class="block">Removes the specified vertex from this graph including all its touching
edges if present. More formally, if the graph contains a vertex <code>
u</code> such that <code>u.equals(v)</code>, the call removes all edges
that touch <code>u</code> and then removes <code>u</code> itself. If no
such <code>u</code> is found, the call leaves the graph unchanged.
Returns <tt>true</tt> if the graph contained the specified vertex. (The
graph will not contain the specified vertex once the call returns).
<p>If the specified vertex is <code>null</code> returns <code>
false</code>.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>v</code> - vertex to be removed from this graph, if present.</dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if the graph contained the specified vertex;
<code>false</code> otherwise.</dd></dl>
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<pre><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><<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a>> vertexSet()</pre>
<div class="block">Returns a set of the vertices contained in this graph. The set is backed
by the graph, so changes to the graph are reflected in the set. If the
graph is modified while an iteration over the set is in progress, the
results of the iteration are undefined.
<p>The graph implementation may maintain a particular set ordering (e.g.
via <a href="http://docs.oracle.com/javase/7/docs/api/java/util/LinkedHashSet.html?is-external=true" title="class or interface in java.util"><code>LinkedHashSet</code></a>) for deterministic iteration, but
this is not required. It is the responsibility of callers who rely on
this behavior to only use graph implementations which support it.</p></div>
<dl><dt><span class="strong">Returns:</span></dt><dd>a set view of the vertices contained in this graph.</dd></dl>
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<pre><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> getEdgeSource(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</pre>
<div class="block">Returns the source vertex of an edge. For an undirected graph, source and
target are distinguishable designations (but without any mathematical
meaning).</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - edge of interest</dd>
<dt><span class="strong">Returns:</span></dt><dd>source vertex</dd></dl>
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<pre><a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">V</a> getEdgeTarget(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</pre>
<div class="block">Returns the target vertex of an edge. For an undirected graph, source and
target are distinguishable designations (but without any mathematical
meaning).</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - edge of interest</dd>
<dt><span class="strong">Returns:</span></dt><dd>target vertex</dd></dl>
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<pre>double getEdgeWeight(<a href="../../org/jgrapht/Graph.html" title="type parameter in Graph">E</a> e)</pre>
<div class="block">Returns the weight assigned to a given edge. Unweighted graphs return 1.0
(as defined by <a href="../../org/jgrapht/WeightedGraph.html#DEFAULT_EDGE_WEIGHT"><code>WeightedGraph.DEFAULT_EDGE_WEIGHT</code></a>), allowing
weighted-graph algorithms to apply to them where meaningful.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - edge of interest</dd>
<dt><span class="strong">Returns:</span></dt><dd>edge weight</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../org/jgrapht/WeightedGraph.html" title="interface in org.jgrapht"><code>WeightedGraph</code></a></dd></dl>
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