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As you learned in Segment 342, you can cast an instance to a class, as long as the instance is, in fact, an instance of the class.
For example, you can work with an element of a vector by casting
that element, an Object instance, into a Movie
instance:
*-- Cast to the Movie class | | *-- Array access | No bug! | | *-- Method call | Movie instance has v v v | rating method ------- ------------------- -------- | ((Movie) (v.firstElement())).rating() |