java.util.PriorityQueue.comparator() Method

Description

The comparator() method returns the comparator used to order the elements in this queue.

Declaration

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

public Comparator<? super E> comparator()

Parameters

• NA

Return Value

• The method call returns the comparator used to order this queue, or null if this queue is sorted according to the natural ordering of its elements.

Exception

• NA

Example

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

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
      prq.add(6);  
      prq.add(9);
      prq.add(5);
      prq.add(64);
      prq.add(6);
      
      System.out.println ( "Priority queue values are: "+ prq);
      
      // create comparator
      Comparator comp = prq.comparator();

      System.out.println ( "Comparator value is: "+ comp);
   }
}

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

Priority queue values are: [5, 6, 6, 64, 9]
Comparator value is: nul