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8.1 Collections Fundamentals: `ArrayList`, `HashSet` & `HashMap`
Topic Summary
Overcome the fixed-size limitation of arrays using dynamic lists, unique sets, and key-value maps.
What You Will Learn
• Choose between `ArrayList`, `HashSet`, and `HashMap` based on access patterns.
• Understand generics syntax `<T>` and type safety.
• Leverage autoboxing and unboxing between primitives and wrapper classes.
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