[jgrapht-users] removeEdge null pointer exception (JGraphT w/ JGraph)

[Haoqi Z. <hq...@ee...>]

Hi there,

I am starting to use JGraph (v5) and JGraphT for a graph applet and in particular would like to allow a user 
to click on an edge to remove it. The problem I am encountering is that when I call removeEdge when 
the click event is triggered, it removes the edge, but then throws a null pointer exception in one of the edge listeners. 
This only happens if I am removing the edge that is being clicked on -- if I remove a different edge there is 
no problem. The removeEdge call is wrapped within a SwingUtilities.InvokeLater, but to no avail.

My code looks something like this:

[within the marqueeEvent handler's mouse press event]
...
DefaultEdge e = (DefaultEdge)jgraphAdapter.getValue(cell);
  SwingUtilities.invokeLater(new Runnable(){
   public void run(){
		graph.removeEdge(e);
   }
  });

If you have encountered this issue before, know of a fix, or have ideas on this, please let me know. Thanks!

Best,
Haoqi