Java: Count the number of elements in a priority queue

Last update on May 22 2025 13:14:17 (UTC/GMT +8 hours)

6. Count PriorityQueue Elements

Write a Java program to count the number of elements in a priority queue.

Sample Solution:-

Java Code:

import java.util.PriorityQueue;
  public class Exercise6 {
  public static void main(String[] args) {
    // create an empty Priority Queue
    PriorityQueue<String> pq = new PriorityQueue<String>();  
   // use add() method to add values in the Priority Queue
          pq.add("Red");
          pq.add("Green");
          pq.add("Black");
          pq.add("Pink");
          pq.add("orange");
     System.out.println("Priority Queue: " + pq);
    System.out.println("Size of the Priority Queue: " + pq.size());
   }
}

Sample Output:

Priority Queue: [Black, Pink, Green, Red, orange]                      
Size of the Priority Queue: 5

For more Practice: Solve these Related Problems:

Write a Java program to determine the size of a PriorityQueue using the size() method and then print the count.
Write a Java program to iterate over a PriorityQueue and manually count the elements, then compare the result with size().
Write a Java program to convert a PriorityQueue to a stream and use count() to display the number of elements.
Write a Java program to add elements to a PriorityQueue, remove some, and then print the updated count using size().

Go to:

PREV : Clear PriorityQueue.
NEXT : Compare PriorityQueues.

Java Code Editor:

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