I'm trying to iterate through all nodes, so I can print them out for graphviz. What is the best way to do that using the JGraphT library?

public static void main(String[] args) {
	UndirectedGraph<String, DefaultEdge> g = new SimpleWeightedGraph<String, DefaultEdge>(DefaultEdge.class);

	String odp = "ODP";
	String cck = "CCK";
	String mfe = "MFE";

	g.addVertex(odp);
	g.addVertex(cck);
	g.addVertex(mfe);

	g.addEdge(odp, cck);
	g.addEdge(odp, mfe);

}

Also, how do I add edge weights?

Edit: This seems to work pretty well. But is there a better way?

	Set<DefaultEdge> edges = g.edgeSet();

	for (DefaultEdge e : edges) {
		gv.addln(String.format("\"%s\" -> \"%s\"", g.getEdgeSource(e), g.getEdgeTarget(e)));			
	}