https://DevOpsCloud.io -- Cloud Monk Losang Jinpa, Ph.D., MCSE/MCT, GitOps DevOps Engineer

Java HashSet is a class that implements the Java Set interface and stores unique elements in an unordered collection. It uses a hash table for efficient lookup, insertion, and deletion operations, ensuring that no duplicates are allowed. Introduced in Java 1995 with Java 1.2, HashSet is widely used in Java applications to manage collections of objects where uniqueness is a requirement. It does not maintain any order for its elements and is more efficient than a list when checking for membership.

https://docs.oracle.com/javase/8/docs/api/java/util/HashSet.html