Open In App

TreeSet size() Method in Java

Improve
Improve
Like Article
Like
Save
Share
Report

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

Last Updated : 26 Nov, 2018
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads