I have class which has an Iterator method ( public Iterator iterator(boolean fromFront) ) and my Iterator method returns a "new DoublyLinkedListIterator()". DoublyLinkedListIterator implements ListIterator which contains the set method. The problem is in my main where my iterator doesn't have access to the set method, Iterator iterator = deque.iterator(true); Nor do I have access to the hasPrevious or previous methods.
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4Please post your code also. – js_248 Apr 18 '16 at 08:56
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if you are sure that you're calling correct method, you can cast returned iterator to your specific DoublyLinkedListIterator – AdamSkywalker Apr 18 '16 at 08:57
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Also, what is your question ? – Nico Apr 18 '16 at 08:57
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set the return type to ListIterator instead of Iterator, or cast it in the main – Tamas Hegedus Apr 18 '16 at 09:05
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If you want to have access to the methods in DoublyLinkedListIterator, you have to return it instead of an Iterator. (Or make a cast before using it).
How to make a cast, in case you need it.
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The standard way to expose a ListIterator is to have a public <T> ListIterator<T> listIterator() method on your class, as in the standard List class, so you can use it as:
ListIterator literator = deque.listIterator();
Note that the builtin Deque<T> class does not support ListIterators. The variable name is taken from your sample code, it has a custom type.
Tamas Hegedus
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If you want to use iterator but want to navigate forward/backward and change the links order, ... to be short every write operation that modify the structure of the list, you're doing it wrong.
Go for the while/do-while loop if you have such needs.
Walfrat
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