HashMap: Operations

The HashMap class in Java provides a variety of operations to manage key-value pairs efficiently. In this lesson, we will explore common operations on a HashMap, including inserting/updating elements, removing elements, retrieving data, and performing bulk operations. Each section includes an explanation, the syntax for the operation, and a code example with a bullet-point explanation.

1. Inserting and Updating Elements

In HashMap, you insert elements using the put() method. This method associates a specified value with a specified key