Java TreeSet : ceiling(), floor(), headSet(), tailSet()

The ceiling() method returns the least element in this set greater than or equal to the given element, or null if there is no such element. The floor() method returns the greatest element in this set less than or equal to the given element, or null if there is no such element. The headset() method returns a view of … Read more…

TreeSet : subSet(), isEmpty(), pollFirst()

The subSet() methods returns a view of the portion of this set whose elements range from fromElement, inclusive, to toElement, exclusive. The isEmpty() methods returns true if this set contains no elements. The pollFirst() methods retrieves and removes the first (lowest) element, or returns null if this set is empty. Program       Program Source import java.util.TreeSet; public class Javaapp … Read more…