The iterator() method of PriorityBlockingQueue class Returns an iterator over the elements in this queue. The elements returned from this method do not follow any order. The returned iterator is weakly consistent.
Syntax:
public Iterator iterator()
Parameter: This method does not take any parameter.
Returns: This method returns an iterator having same elements as present in PriorityBlockingQueue.
Below program illustrate iterator() method of PriorityBlockingQueue.
Example 1:
// Java Program Demonstrate iterator()// method of PriorityBlockingQueue  import java.util.concurrent.PriorityBlockingQueue;import java.util.*;  public class GFG {    public static void main(String[] args)    {          // define capacity of PriorityBlockingQueue        int capacityOfQueue = 5;          // create object of PriorityBlockingQueue        PriorityBlockingQueue<Integer> PrioQueue            = new PriorityBlockingQueue<Integer>(capacityOfQueue);          // Add elements to PriorityBlockingQueue        PrioQueue.add(945645);        PrioQueue.add(6468516);        PrioQueue.add(7564165);        PrioQueue.add(45616);          // print PrioQueue        System.out.println("PrioQueue: " + PrioQueue);          // Call iterator() method of PriorityBlockingQueue        Iterator iteratorVals = PrioQueue.iterator();          // Print elements of iterator        // created from PriorityBlockingQueue        System.out.println("The iterator values"                           + " of PriorityBlockingQueue are:");          while (iteratorVals.hasNext()) {            System.out.println(iteratorVals.next());        }    }} |
Output:
PrioQueue: [45616, 945645, 7564165, 6468516] The iterator values of PriorityBlockingQueue are: 45616 945645 7564165 6468516
Example 2: To illustrate iterator() method of PriorityBlockingQueue which contains list of names.
// Java Program Demonstrate iterator()// method of PriorityBlockingQueue  import java.util.concurrent.PriorityBlockingQueue;import java.util.*;  public class GFG {    public static void main(String[] args)    {          // define capacity of PriorityBlockingQueue        int capacityOfQueue = 5;          // create object of PriorityBlockingQueue        PriorityBlockingQueue<String> names            = new PriorityBlockingQueue<String>(capacityOfQueue);          // Add names of students of girls college        names.add("Geeks");        names.add("forGeeks");        names.add("A");        names.add("Computer");        names.add("Portal");          // Call iterator() method of PriorityBlockingQueue        Iterator iteratorVals = names.iterator();          // Print elements of iterator        // created from PriorityBlockingQueue        System.out.println("The Names are:");          while (iteratorVals.hasNext()) {            System.out.println(iteratorVals.next());        }    }} |
Output:
The Names are: A Computer Geeks forGeeks Portal
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