comparing open source java graph drawing frameworks(JUNG and Prefuse) for drawing network topology

Question

which of the open source Java graph drawing frameworks to use for a network diagram with the following requirements? The graph will have less than 1000 nodes.

1) has par

Answer 1

I like @holygeek's answer. Here is my implementation to the solution for 2 (both directed and undirected edges), for Prefuse:

public class MyRenderFactory implements RendererFactory
{
    private NodeRenderer nodeRenderer = new NodeRenderer();
    private EdgeRenderer defaultEdgeRenderer = new EdgeRenderer();
    private EdgeRenderer undirectedEdgeRenderer = new EdgeRenderer(EdgeRenderer.EdgeType.LINE, EdgeRenderer.EdgeArrowType.NONE);

    public static String directedness = "myEdgeDirectedness";

    public enum EdgeDirected
    {
        directed, undirected;

        public static EdgeDirected fromIsDirected(boolean isDirected)
        {
            if (isDirected)
            {
                return directed;
            }
            return undirected;
        }
    }

    @Override
    public Renderer getRenderer(VisualItem visualItem)
    {
        if (visualItem instanceof EdgeItem)
        {
            if (visualItem.get(directedness).equals(PrefuseGraphConverter.EdgeDirected.undirected))
            {
                return undirectedEdgeRenderer;
            }
            return defaultEdgeRenderer;
        }
        return nodeRenderer;
    }
}

...elsewhere, where the graph is created...

MyRenderFactory.EdgeDirected directedness =
        MyRenderFactory.EdgeDirected.fromIsDirected(myEdge.isDirected());
prefuseEdge.set(MyRenderFactory.directedness, directedness);