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For a student learning AP Computer Science A, it's important to grasp fundamental Java programming concepts and structures. Here's a list of essential Java code snippets that cover the core topics generally included in the AP Computer Science A curriculum:

1. Hello World - Basic Program Structure

2. Variables and Data Types

3. Conditionals - If-Else Statements

4. Loops - For Loop

5. While Loop

6. Arrays

7. Methods

8. Object-Oriented Programming - Classes and Objects

9. Using ArrayList

10. Inheritance

11. Polymorphism

12. Recursion

2025 CSA Warm-up AP Computer Science A Key Points
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