The Java.util.PriorityQueue.iterator() method is used to return an iterator of the same elements as the Priority Queue. The elements are returned in random order from what present in the Queue.
Syntax:
Iterator iterate_value = Priority_Queue.iterator();
Parameters: The function does not take any parameter.
Return Value: The method iterates over the elements of the queue and returns the values(iterators).
Below programs illustrate the Java.util.PriorityQueue.iterator() method:
Program 1:
// Java code to illustrate iterator()import java.util.*;  public class PriorityQueueDemo {    public static void main(String args[])    {        // Creating an empty PriorityQueue        PriorityQueue<String> queue = new PriorityQueue<String>();          // Use add() method to add elements into the Queue        queue.add("Welcome");        queue.add("To");        queue.add("Geeks");        queue.add("4");        queue.add("Geeks");          // Displaying the PriorityQueue        System.out.println("PriorityQueue: " + queue);          // Creating an iterator        Iterator value = queue.iterator();          // Displaying the values after iterating through the queue        System.out.println("The iterator values are: ");        while (value.hasNext()) {            System.out.println(value.next());        }    }} |
Output:
PriorityQueue: [4, Geeks, To, Welcome, Geeks] The iterator values are: 4 Geeks To Welcome Geeks
Program 2:
// Java code to illustrate iterator()import java.util.*;  public class PriorityQueueDemo {    public static void main(String args[])    {        // Creating an empty PriorityQueue        PriorityQueue<Integer> queue = new PriorityQueue<Integer>();          // Use add() method to add elements into the Queue        queue.add(10);        queue.add(15);        queue.add(30);        queue.add(20);        queue.add(5);          // Displaying the PriorityQueue        System.out.println("PriorityQueue: " + queue);          // Creating an iterator        Iterator value = queue.iterator();          // Displaying the values after iterating through the queue        System.out.println("The iterator values are: ");        while (value.hasNext()) {            System.out.println(value.next());        }    }} |
Output:
PriorityQueue: [5, 10, 30, 20, 15] The iterator values are: 5 10 30 20 15
