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You need an import statement so the compiler can find the definition of the Iterator interface.

Start by making a skeleton class that implements the interface and has all the methods.
Then work...

Check that all the {s have a matching } and that no methods are defined inside of other methods.

The compiler can't find a definition for the iterator() method in the LinkedListDS class.
If you implement an interface you must define all of its methods.


Where is the ^ located in the...