Hash Tables In Java | JAVA Data Structures Full | Java Playlist |

Dive into one of the most important data structures: the Hash Table! 🗂️ In this tutorial, we unravel the magic behind Java's HashMap and how it achieves lightning-fast O(1) lookups on average.

We'll break down the core concepts from the ground up, including hash functions, buckets, and the critical problem of collisions. You'll understand exactly how HashMap works under the hood.

What you'll learn:

What is a Hash Table? The intuition behind key-value pairs.

How a hash function transforms a key into an array index.

The Collision Problem: What happens when two keys hash to the same value?

Collision Resolution: Separate Chaining vs. Open Addressing.

A deep dive into Java's HashMap and how it uses equals() and hashCode().

Practical use-cases: caching, frequency counting, and data indexing.

This is essential knowledge for writing efficient code and acing technical interviews.

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