← Exit to Module 11: Collections Framework Deep Dive lessons
Module progress · 0%Lesson · 20 min
Module 11: Collections Framework Deep Dive
Lesson focusSet Implementations: HashSet, TreeSet, LinkedHashSet
Choose the right set for hashing, ordering, or insertion order.
01 · 14 minCollections Hierarchy OverviewLocked02 · 18 minList Implementations: ArrayList, LinkedList, VectorLocked03 · 20 minSet Implementations: HashSet, TreeSet, LinkedHashSetLocked04 · 22 minMap Implementations: HashMap, TreeMap, LinkedHashMapLocked05 · 16 minQueue & Deque ImplementationsLocked06 · 12 minComparable vs ComparatorLocked07 · 12 minCollections Utility ClassLocked08 · 14 minIteration Techniques & Fail-Fast BehaviorLocked09 · 35 minMini-Project: Contact Management SystemLocked
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.