[jgrapht-users] Use more then one same or different Edges between two nodes

[Stan N. <dj-...@ar...>]

Hi, jgrapht users.

I trying to set more then one Edge between two nodes: my class:
. . . .


public class HarmoGraph {

    /** Creates a new instance of HarmoGraph */
    public HarmoGraph() {
        // create a graph based on strings
            DefaultDirectedWeightedGraph Graph = createGraph();
        System.out.println(Graph.toString());
	 }

    public DefaultDirectedWeightedGraph<String, Double> createGraph()
    {
        DefaultDirectedWeightedGraph<String, Double> g = new
DefaultDirectedWeightedGraph(DefaultEdge.class);

        String T = "T";
        String S = "S";
        String D = "D";
        String Tp = "Tp";
        String Dp = "Dp";
        String Sp = "Sp";
        String Dv = "Dv";
        String D7 = "D7";

        // add the vertices
        g.addVertex(T);
        g.addVertex(S);
        g.addVertex(D);
        g.addVertex(Tp);
        g.addVertex(Dp);
        g.addVertex(Sp);
        g.addVertex(Dv);
        g.addVertex(D7);
       // g.setEdgeWeight(e1, 10);


	//Hier setting Edges between Nodes
	//Another directions has an another Edge
	//between the same nodes.
	g.addEdge(D, T, 2.0);
        g.addEdge(T, S, 1.0);
        g.addEdge(S, T, 1.0);
        g.addEdge(S, D, 1.0);
        g.addEdge(D, S, 1.0);
        g.addEdge(T, D, 3.0);
        return g;

    }

}


//End Class.

I do not understand, why I become this output:
([T, S, D, Tp, Dp, Sp, Dv, D7], [2.0=(D,T), 1.0=(T,S), 3.0=(T,D)])

Where are my another Edges = 1.0 between (S, T), (S, D) and (D, S)?


Best regards and thanks a lot.
Stan