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AP Computer Science A›Unit 4: Data Collections›ArrayList and 2D arrays

Wrapper Classes and Autoboxing

Integer and Double wrap primitive values as objects so they can go in an ArrayList; Java converts between them automatically.

Integer and Double
Autoboxing and unboxing
Why ArrayList needs them

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4Data Collections

Ethics of Data Collection
Introduction to Data Sets
Creating and Traversing Arrays
Array Algorithms
Using Text Files
Wrapper Classes and Autoboxing
ArrayList Methods
Removing While Traversing
Implementing ArrayList Algorithms
2D Arrays
Searching and Sorting
Recursion
Recursive Searching and Sorting

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ArrayList Methods

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3Goldie's Math Emporium
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Also called: wrapper classes, autoboxing