Unit 4 Day 17: ArrayList vs Array
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Unit 4 - Day 17
Arraylist Vs Array
AP CSA Daily Practice
Medium
Today's Question
Which statement is TRUE about ArrayList compared to arrays?
int[] arr = new int[5];
ArrayList list = new ArrayList();
Explanation
ArrayList can grow and shrink dynamically using add() and remove(). Arrays have fixed size. ArrayList uses wrapper classes (not primitives), and uses get()/set() methods (not []).
Key Concept
ArrayList: dynamic size, objects only, uses methods. Array: fixed size, primitives OK, uses brackets.
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