TreeSet iterator() Method in Java

The Java.util.TreeSet.iterator() method is used to return an iterator of the same elements as that of the TreeSet. The elements are returned in random order from what was present in the Tree set.

Syntax:

Iterator iterate_value = Tree_Set.iterator();

Parameters: The function does not take any parameter.



Return Value: The method iterates over the elements of the Tree set and returns the values(iterators).

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

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to illustrate iterator()
import java.util.*;
import java.util.TreeSet;
  
public class TreeSetDemo {
    public static void main(String args[])
    {
        // Creating an empty TreeSet
        TreeSet<String> set = new TreeSet<String>();
  
        // Use add() method to add elements into the Set
        set.add("Welcome");
        set.add("To");
        set.add("Geeks");
        set.add("4");
        set.add("Geeks");
  
        // Displaying the TreeSet
        System.out.println("TreeSet: " + set);
  
        // Creating an iterator
        Iterator value = set.iterator();
  
        // Displaying the values after iterating through the set
        System.out.println("The iterator values are: ");
        while (value.hasNext()) {
            System.out.println(value.next());
        }
    }
}

chevron_right


Output:

TreeSet: [4, Geeks, To, Welcome]
The iterator values are: 
4
Geeks
To
Welcome


My Personal Notes arrow_drop_up

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.