java.util.PriorityQueue.toArray() Method

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Description

The toArray() method is used to return an array containing all of the elements in this queue.

Declaration

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

public Object[] toArray()

Parameters

NA

Return Value

• The method call returns an array containing all of the elements in this queue.

Exception

NA

Example

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

package com.tutorialspoint;
import java.util.PriorityQueue;

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);

      // get objects from the queue
      Object[] arr = prq.toArray(); 
     
      System.out.println("Value in array: ");

      for ( int i = 0; i<arr.length; i++ ) {  
         System.out.println("Value: " + arr[i].toString()) ; 
      }
   }
}

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

Priority queue values are: [5, 6, 6, 64, 9]
Value in array: 
Value: 5
Value: 6
Value: 6
Value: 64
Value: 9