Intermediate module

Module 11: Collections Framework in Practice

Choose practical collections, understand common tradeoffs, and write cleaner code for lists, sets, maps, and sorting.

Module lessons

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Choose lists, sets, or maps based on the job instead of guessing.

Compare ArrayList and LinkedList and learn which one fits most real projects.

Use sets to remove duplicates and check membership efficiently.

Store and retrieve values by key with clear and predictable map code.

Sort objects cleanly using Comparable and Comparator.

Build a contact manager that combines lists, maps, and sorting in one small program.