Intermediate module
Module 11: Collections Framework Deep Dive
Go beyond lists with sets, maps, queues, comparators, and utility classes.
Lessons
9
Short units, clear order.
Starts with
Collections Hierarchy Overview
Finish line
Mini-Project: Contact Management System
Lesson checklist
Module 11: Collections Framework Deep Dive
Collections Hierarchy Overview
Map the interfaces and implementations to choose the right collection.
List Implementations: ArrayList, LinkedList, Vector
Compare performance characteristics and use cases.
Set Implementations: HashSet, TreeSet, LinkedHashSet
Choose the right set for hashing, ordering, or insertion order.
Map Implementations: HashMap, TreeMap, LinkedHashMap
Store key/value pairs with predictable performance and ordering.
Queue & Deque Implementations
Use PriorityQueue, ArrayDeque, and BlockingQueue variants.
Comparable vs Comparator
Implement natural ordering or supply external comparators for flexible sorting.
Collections Utility Class
Explore helper methods like `Collections.sort`, `shuffle`, `unmodifiableList`, and `synchronizedList`.
Iteration Techniques & Fail-Fast Behavior
Iterate safely using iterators, ListIterator, and streams.
Mini-Project: Contact Management System
Manage contacts using maps, sets for deduplication, and comparators for sorted views.
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