HashMap Implementation for Java

HashMap is a dictionary data structure provided by java. It’s a Map-based collection class that is used to store data in Key & Value pairs. In this article, we’ll be creating our own hashmap implementation.

The benefit of using this data structure is faster data retrieval. It has data access complexity of O(1) in the best case.

In layman’s terms, a for each key we get the associated value.

To implement this structure,

1. We need a list to store all the keys
2. Key — Value…