Contains Duplicate ll | java HashSet |

In this video, I explain how to check for duplicates in an array using Java's HashSet. This is a common problem in coding interviews, and I'll show you an efficient solution with step-by-step explanations. Learn how to leverage the power of HashSet to detect duplicate values in an array in O(n) time complexity!

We'll go through:

1) Problem breakdown and examples
2) Java solution using HashSet
3) Code explanation and time complexity analysis

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