The Java.util.PriorityQueue.size() method is used to get the size of the PriorityQueue or the number of elements present in the PriorityQueue.
Syntax:
Priority_Queue.size()
Parameters: This method does not takes any parameter.
Return Value: The method returns the size or the number of elements present in the PriorityQueue.
Below programs illustrate the Java.util.PriorityQueue.size() method:
Program 1:
// Java code to illustrate size()import java.util.*; public class PriorityQueueDemo { public static void main(String args[]) { // Creating an empty PriorityQueue PriorityQueue<String> queue = new PriorityQueue<String>(); // Use add() method to add elements into the Queue queue.add("Welcome"); queue.add("To"); queue.add("Geeks"); queue.add("For"); queue.add("Geeks"); // Displaying the PriorityQueue System.out.println("PriorityQueue: " + queue); // Displaying the size of the PriorityQueue System.out.println("The size of the queue is: " + queue.size()); }} |
Output:
PriorityQueue: [For, Geeks, To, Welcome, Geeks] The size of the queue is: 5
Program 2:
// Java code to illustrate size()import java.util.*; public class PriorityQueueDemo { public static void main(String args[]) { // Creating an empty PriorityQueue PriorityQueue<Integer> queue = new PriorityQueue<Integer>(); // Use add() method to add elements into the Queue queue.add(10); queue.add(15); queue.add(30); queue.add(20); queue.add(5); queue.add(18); // Displaying the PriorityQueue System.out.println("PriorityQueue: " + queue); // Displaying the size of the PriorityQueue System.out.println("The size of the queue is: " + queue.size()); }} |
Output:
PriorityQueue: [5, 10, 18, 20, 15, 30] The size of the queue is: 6
