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Java PriorityQueue iterator() Method with Example

PriorityQueue Class iterator() method: Here, we are going to learn about the iterator() method of PriorityQueue Class with its syntax and example.
Submitted by Preeti Jain, on March 11, 2020

PriorityQueue Class iterator() method

• iterator() method is available in java.util package.
• iterator() method is used to iterates the elements by using iterator() method in this PriorityQueue.
• iterator() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• iterator() method does not throw an exception at the time of returning the Iterator.

Syntax:

    public Iterator iterator();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is Iterator, it returns an Iterator object is to iterate the PriorityQueue elements.

Example:

// Java program to demonstrate the example 
// of Iterator iterator() method of 
// PriorityQueue

import java.util.*;
public class IteratorOfPriorityQueue {
    public static void main(String args[]) {
        // Instantiate PriorityQueue
        PriorityQueue < String > pq = new PriorityQueue < String > ();

        // By using add() method is add
        // the given element into priority
        // queue
        pq.add("C");
        pq.add("C++");
        pq.add("JAVA");
        pq.add("PHP");
        pq.add("ANDROID");

        // Display PriorityQueue
        System.out.println("PriorityQueue: " + pq);

        // By using iterator() method is to
        // iterate the PriorityQueue elements
        for (Iterator iter = pq.iterator(); iter.hasNext();)
            System.out.println(iter.next());
    }
}

Output

PriorityQueue: [ANDROID, C, JAVA, PHP, C++]
ANDROID
C
JAVA
PHP
C++