Implementing Map Interface

This lecture covers the concept of HashMap in Java, focusing on its key-value pair structure. It compares HashMap with ArrayList, highlighting differences in indexing. A practical example demonstrates how to use HashMap, including adding, retrieving, and removing entries. The lecture also explains the use of entry sets for iterating over HashMap entries and how to cast entries to separate keys and values. The session concludes with a discussion on converting HashMap to a set and iterating through it.

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