Set Interface

The Set interface is a way to organize a collection of unique items, meaning no duplicates are allowed. Think of it like a real-world set of objects—like a collection of unique books or employee IDs—where each item appears only once. Sets are useful when you need to ensure that there are no duplicates, and they often support operations like adding, removing, and checking if an item exists. In programming, the Set interface defines the basic behaviors for such collections, providing a blueprint for creating and managing groups of distinct elements efficiently.