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Java TreeSet higher() Method with Example

TreeSet Class higher() method: Here, we are going to learn about the higher() method of TreeSet Class with its syntax and example.
Submitted by Preeti Jain, on February 20, 2020

TreeSet Class higher() method

  • higher() method is available in java.util package.
  • higher() method is used to return the lowest element in this TreeSet that is higher than the specified element (ele).
  • higher() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • higher() method may throw an exception at the time of returning the element.
    • ClassCastException: This exception may throw when the given parameter is incompatible to compare.
    • NullPointerException: This exception may throw when the given element is null exists.


    public Element higher(Element ele);


  • Element ele – represents the element (ele) is to be checked with other element exists in this TreeSet.

Return value:

The return type of the method is Element, it returns least element higher than the given element (ele) in this TreeSet otherwise it returns null.


// Java program to demonstrate the example 
// of Element higher(Element ele) method of TreeSet 

import java.util.*;

public class HigherOfTreeSet {
    public static void main(String[] args) {
        // Instantiates a TreeSet object
        TreeSet < String > tree_set = new TreeSet < String > ();

        // By using add() method is to add
        //the given object of this TreeSet 

        // Display TreeSet
        System.out.println("TreeSet: " + tree_set);

        // By using higher() method is to
        // return the least element higher than
        // the given element i.e. PHP
        Object least = tree_set.higher("Microservices");

        // Display least
        System.out.println("tree_set.higher(Microservices): " + least);


TreeSet: [C, C++, JAVA, PHP, SFDC]
tree_set.higher(Microservices): PHP

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