comparator

The Treemap is a component of the Java Collections Framework that implements the SortedMap interface. It keeps its elements ordered according to the natural ordering of keys or a defined comparator.

TreeSet is a Java Collections Framework class that implements the SortedSet interface. It returns a set that is sorted in natural order or by a provided comparator. TreeSet, unlike HashSet, does not allow duplicate elements and delivers fast performance for simple operations like adding, removing, and searching for elements.