If I create an Iterator object on any List, do I have to create a new iterator object every time I traverse the list? Or do new items added or removed from the list automatically get accounted for by the previously created iterator?
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If I create an Iterator object on any List, do I have to create a new iterator object every time I traverse the list? Or do new items added or removed from the list automatically get accounted for by the previously created iterator?
Iteratoris a one-use utility. You generally need a new one each time you iterate through the list. However, that’s not a bad thing;Iterators have very little state (for anArrayList, it might be just an int to hold the current index).If the backing list is modified in between iterator calls, you will get a
ConcurrentModificationExceptionfrom the iterator operation. Adding or removing items must be done using theIteratoritself.