Building a Hash Table from Scratch

This lesson is about how Hash Tables are implemented in Java and how we build a Hash function.

Hash Table using Buckets

As said earlier, Hash Tables are implemented using Arrays. The implementation of a Hash Table is quite simple. In this lesson, we will use Bucket strategy to avoid collisions. In the Bucket strategy, we chain different arrays together to store elements, where each array is called Bucket.

The size of the Hash Table is set as:


Here, n is the number of keys it can hold, and m is the number of slots each bucket contains. Each slot holds a key/value pair.

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