java.util.PriorityQueue.size() Method

Description

The size() method is used to return the number of elements in this collection.

Declaration

Following is the declaration for java.util.PriorityQueue.size() method.

public int size()

Parameters

NA

Return Value

• The method call returns the number of elements in this collection

Exception

NA

Example

The following example shows the usage of java.util.PriorityQueue.size()

package com.tutorialspoint;

import java.util.*;

public class PriorityQueueDemo {
   public static void main(String args[]) {

      // create priority queue
      PriorityQueue < Integer >  prq = new PriorityQueue < Integer > (); 

      // insert values in the queue
      for ( int i = 3; i  <  10; i++ ) {  
         prq.add (new Integer (i)) ; 
      }

      System.out.println("Size of the queue is: "+ prq.size());
      System.out.println("Priority queue values are: "+ prq);
   }
}

Let us compile and run the above program, this will produce the following result.

Size of the queue is: 7
Priority queue values are: [3, 4, 5, 6, 7, 8, 9]