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:
// 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());        }    }} |
Output:
TreeSet: [4, Geeks, To, Welcome] The iterator values are: 4 Geeks To Welcome
