Java Programming: Simplifying Data Storage and Manipulation with Sets | Quick Guide

How to use it?

Create an instance of a Set implementation, like HashSet.
Use the add() method to insert elements into the Set.
Use the contains() method to check if the Set contains a specific element.
Iterate through the Set using a for-each loop or an iterator.

In this example, we create a Set of strings using the HashSet implementation. We add elements to the Set and print it out, which will only show apple, banana, and orange since apple is a duplicate and not added. We then remove banana from the Set and check if orange is present using the contains() method.