Java: Convert a priority queue to an array containing all of the elements of the queue

Last update on May 22 2025 13:15:34 (UTC/GMT +8 hours)

10. Convert PriorityQueue to Array

Write a Java program to convert a priority queue to an array containing all its elements.

Sample Solution:-

Java Code:

import java.util.*;

  public class Example10 {
  public static void main(String[] args) {

   // Create Priority Queue
           PriorityQueue<String> pq1 = new PriorityQueue<String>();  
   // use add() method to add values in the Priority Queue
          pq1.add("Red");
          pq1.add("Green");
          pq1.add("Black");
          pq1.add("White");
    System.out.println("Original Priority Queue: "+pq1);
   
   //Convert a linked list to array list    
   List<String> array_list = new ArrayList<String>(pq1);
   System.out.println("Array containing all of the elements in the queue: "+array_list);
    
   }    
}

Sample Output:

Original Priority Queue: [Black, Red, Green, White]                    
Array containing all of the elements in the queue: [Black, Red, Green, 
White]

For more Practice: Solve these Related Problems:

Write a Java program to convert a PriorityQueue to an array using toArray() and print the array contents.
Write a Java program to convert a PriorityQueue to an array and then sort the array using Arrays.sort().
Write a Java program to convert a PriorityQueue to an array and iterate over the array to perform a specific computation.
Write a Java program to convert a PriorityQueue to an array using streams and then filter the array elements before printing.

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