﻿ Java Collection, PriorityQueue Exercises: Count the number of elements in a priority queue - w3resource # 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>();
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:

What is the difficulty level of this exercise?

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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