Lesson 3 of 920 minModule progress 0%

Module 11: Collections Framework Deep Dive

Set Implementations: HashSet, TreeSet, LinkedHashSet

Choose the right set for hashing, ordering, or insertion order.

HashSet provides O(1) operations but no ordering; supply robust hashCode/equals implementations.

LinkedHashSet preserves insertion order with mild overhead.

TreeSet sorts elements via natural ordering or comparators—perfect for range queries and navigation methods.

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Lesson check

Which set maintains sorted order?

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