Consider the following situation. You create a list, and then you add 10 items to it. You get an iterator to the list and call next twice to advance it. You remove the first five items from the list, using the list’s remove method. You then call the iterator’s remove method, expecting to remove the item last returned by the method next. However, this entry has already been removed from the list. Changing the state of the list while using the iterator, as you have done here, may result in unpredictable behavior of the iterator.
Modify the interface Iterator so that the methods will throw the exception StateChangedException if the state of the list is changed after the iterator was created but before the method is called. Modify the implementation of LinkedListWithIterator that Project 1 describes to accommodate the changes to Iterator.
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