Exporting graph in GEXF format

[Rajesh Veeranki <rveeranki01 AT gmail.com>]

Hi ,

I'm back with a new question.I want to export the graph into GEXF format. I tried something like this, but its giving a null pointer exception.

.................

                Graph g = new SingleGraph("");

                FileSinkBase fsb = null;

FileWriter f = new FileWriter("out.txt");

PrintWriter pw = new PrintWriter(f);

fsb.writeAll(g, pw);

.................

Please help  me regarding this and how to export it.

Thanks,

Rajesh V.