Java TreeSet
Java TreeSet is a class in the Java Collections Framework that implements the Set interface and provides a red-black tree-based implementation of a sorted set. Unlike HashSet, which does not guarantee any specific order, TreeSet maintains its elements in sorted order based on their natural ordering or a specified comparator. This allows for efficient retrieval of elements in ascending order, making TreeSet suitable for scenarios where you need to maintain a sorted collection of unique elements. TreeSet achieves this by internally using a balanced binary search tree, ensuring logarithmic time complexity for basic operations like add, remove, and contains. TreeSet offers methods for adding, removing, and accessing elements, as well as various operations for finding elements, such as finding the first or last element or finding elements within a specified range. Additionally, TreeSet provides navigation methods for navigating the set in sorted order, making it useful for tasks like range queries or maintaining ordered collections. However, TreeSet may have slightly slower performance compared to HashSet due to the overhead of maintaining the tree structure. Overall, TreeSet provides a reliable and efficient solution for maintaining sorted sets in Java applications.