HashSet: Operations

The HashSet class in Java provides various operations to manage collections of unique elements. In this lesson, we will cover several fundamental operations on a HashSet, including inserting, removing, checking size, verifying element existence, and converting to an array. Each section includes an explanation, the syntax used for that operation, and a simple example to illustrate its usage.

1. Inserting Elements

Inserting elements into a HashSet is done using the add() method. This method adds an element if it is not already present in the set