java.util.PriorityQueue.comparator() Method


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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
java_util_priorityqueue.htm
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