The Java.util.PriorityQueue.size() method is used to get the size of the PriorityQueue or the number of elements present in the PriorityQueue.
Syntax:
Priority_Queue.size()
Parameters: This method does not takes any parameter.
Return Value: The method returns the size or the number of elements present in the PriorityQueue.
Below programs illustrate the Java.util.PriorityQueue.size() method:
Program 1:
// Java code to illustrate size()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("For");        queue.add("Geeks");          // Displaying the PriorityQueue        System.out.println("PriorityQueue: " + queue);          // Displaying the size of the PriorityQueue        System.out.println("The size of the queue is: " + queue.size());    }} |
Output:
PriorityQueue: [For, Geeks, To, Welcome, Geeks] The size of the queue is: 5
Program 2:
// Java code to illustrate size()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);        queue.add(18);          // Displaying the PriorityQueue        System.out.println("PriorityQueue: " + queue);          // Displaying the size of the PriorityQueue        System.out.println("The size of the queue is: " + queue.size());    }} |
Output:
PriorityQueue: [5, 10, 18, 20, 15, 30] The size of the queue is: 6
