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Unit 7: ArrayList

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What is an ArrayList, how does it differ from an array, and how do you declare and create one?

Topic 7.1 Introduction to ArrayList: declare and create an ArrayList using generics, and explain how a resizable ArrayList differs from a fixed-size array.
A focused answer to AP CSA Topic 7.1, covering what an ArrayList is, the import statement, declaring and creating an ArrayList with generic type parameters, why only object (reference) types are allowed, autoboxing of wrapper types, and how an ArrayList differs from an array, with a fully worked example.
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