TreeSet class is the class that implements NavigableSet interface and NavaigableSet extends SortedSet which extends Set. TreeSet contains unique elements. Another important and powerful property is ...

Automatically sorted: When elements are added to a TreeSet, they are automatically sorted in ascending order. Does not allow duplicates: If you try to add an element that already exists, it will be ...

treeset will never allow null cuz it need to compare the content. In Java, a TreeSet is primarily used when you need to store a collection of unique elements that must be kept in a sorted order.

Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions. Programmers frequently need to ...