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Java Collection, PriorityQueue Exercises: Count the number of elements in a priority queue

Java Collection, PriorityQueue Exercises: Exercise-6 with Solution

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

Java Code Editor:

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Java: Tips of the Day

Choice between Float and Double:

Data type Bytes used Significant figures (decimal)
Float 4 7
Double 8 15

Double is often preferred over float in software where precision is important because of the following reasons:
Most processors take nearly the same amount of processing time to perform operations on Float and Double. Double offers far more precision in the same amount of computation time.

Ref: https://bit.ly/3oj7K2K