Module 11: Collections Framework Deep Dive
Collections Utility Class
Explore helper methods like `Collections.sort`, `shuffle`, `unmodifiableList`, and `synchronizedList`.
Use unmodifiable wrappers to return read-only views without copying data.
Use Collections.frequency, disjoint, and reverseOrder to reduce boilerplate.
Prefer List.copyOf/Set.copyOf (Java 10+) for concise immutable collections.