TreeSet size() Method in Java

The Java.util.TreeSet.size() method is used to get the size of the Tree set or the number of elements present in the Tree set.

Syntax:

Tree_Set.size()

Parameters: The method does not take any parameter.

Return Value: The method returns the size or the number of elements present in the Set.

Below program illustrates the use of Java.util.TreeSet.size() method:

// Java code to illustrate size() 
import java.util.*; 
import java.util.TreeSet; 
  
public class TreeSetDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty TreeSet 
        TreeSet<String> tree = new TreeSet<String>(); 
  
        // Use add() method to add elements into the Set 
        tree.add("Welcome"); 
        tree.add("To"); 
        tree.add("Geeks"); 
        tree.add("4"); 
        tree.add("Geeks"); 
        tree.add("TreeSet"); 
  
        // Displaying the TreeSet 
        System.out.println("TreeSet: " + tree); 
  
        // Displaying the size of the set 
        System.out.println("The size of the set is: " + tree.size()); 
    } 
} 

Output:

TreeSet: [4, Geeks, To, TreeSet, Welcome]
The size of the set is: 5

Attention reader! Don’t stop learning now. Get hold of all the important Java and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.

My Personal Notes

Recommended Posts:

Chinmoy Lenka

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.