[jgrapht-users] A question to cycle detection using DefaultDirectedGraph

[Rui C. <cha...@ho...>]

Hi All, I am new to JGraphT. I want to use CycleDetector to detect cycles in a DefaultDirectedGraph. In my code, the graph is initialized/constructed at the beginning of the program, then I have a loop, in each of which, the graph is modified by calling addEdge and/or removeEdge randomly. But the total vertex set stay the same. In each loop, after modification on graph, I initiate a new CycleDetector class to detect cycles in the modified graph, but sometimes, I see obviously there are cycles in the modified graph, which is not captured by CycleDetector!
 I wonder is it some bug or is it my mistake to use CycleDetector in this way as I recall the javadoc of CycleDetector class says something like: "The inspected graph is specified at construction time and cannot be modified"...
 But I don't know if I really understand what it means...
Thanks for any thought!Best,Ray