From: Zhigang Wu <epzgwu@sc...>  20140829 11:31:41

Dear jgrapht users, In my problem, I want to traverse the graph to find a certain vertex, then delete the vertex accompanied with all the edges connected to it. Then I will traverse the remained graph again, find another vertex by some special rules, deleted the vertex and all the connected edges. However, when I translate the procedure into JAVA codes, I always receive the same error message: java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) at java.util.ArrayList$Itr.next(Unknown Source) at java.util.Collections$UnmodifiableCollection$1.next(Unknown Source) at org.jgrapht.graph.AbstractGraph.removeAllEdges(AbstractGraph.java:89) .. The following is my JAVA code related to this: for (Node myNode : myNodeList) { // Some codes to find the certain node, the name is myNode // Some operations myGraph.removeAllEdges(myGraph.edgesOf(myNode)); myGraph.removeVertex(myNode); } This problem has bothered me for quite a long time, many thanks in advance! Best Regards Zhigang Wu 