Originally posted by Michael Ku:
Ask yourself these questions:
If a have a Map, do I access one of its elements with a String or an integer?
If I have an Array or a List, do I access one of its elements with a String or an integer?
This is just basic Java knowledge that is applied the  operator when dealing with Maps, Lists and Arrays
Originally posted by Mark Garland:
Were they helpful?
If so, prove it by answering the question you originally posed (that way it would act as a reference for others).