Here is my code. I have an arraylist of visited elements. So I want delete these visited elements from the hashmap and below is code. It gives me concurrentmodification exception.
private static void removeVisitedNodes(ArrayList<String> arrayList) {
// TODO Auto-generated method stub
Iterator<String> it = arrayList.iterator();
String temp;
while(it.hasNext())
{
temp = it.next();
System.out.println("temp is " + temp);
Iterator<Entry<String, ArrayList<String>>> iter = neighbours_reachability_map.entrySet().iterator();
// iterate through the hashmap to remove elements
while (iter.hasNext()) {
Entry<String, ArrayList<String>> entry = iter.next();
if(entry.getValue().contains(temp)){
//System.out.println("Contains it" + entry.getValue().toString());
entry.getValue().remove(temp);
}
}
}
}
I checked up a few other similar questions but they did not help much. Is there a neater way to do this without causing an exception? Thanks in advance for your help.
