HashSet: Exercise
Explore how to identify duplicate elements in an unsorted array using Java HashSet. This lesson guides you through creating and managing a HashSet to solve the problem efficiently with linear time complexity, helping you understand practical Set usage in Java.
We'll cover the following...
We'll cover the following...
Problem: Find duplicate element
You are given an array in which all the elements are unique except one element. You need to find the duplicate element.
For example, the array ...