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I’m getting a ConcurrentModificationException despite using the iterator to perform the remove operation. Any ideas as to why?
for (Iterator<Thread> iter = threads.iterator(); iter.hasNext();) {
Thread hook = iter.next();
if(someCondition){
iter.remove();
}
}
Because you have a modification concurrent to using an Iterator, which is not supported. Either iterate a list clone, or use a CopyOnWriteArrayList.
Or memory what to remove in a new list, and call list.removeAll(whatIWantedToRemove) afterwards.