ConcurrentLinkedQueue size() method in Java
Last Updated :
26 Nov, 2018
Improve
The size() method of ConcurrentLinkedQueue is used to returns number of elements that this ConcurrentLinkedQueue contains.
Syntax:
Java
Java
public int size()Returns: This method number of elements in this ConcurrentLinkedQueue. Below programs illustrate size() method of ConcurrentLinkedQueue: Example 1:
// Java Program Demonstrate size()
// method of ConcurrentLinkedQueue
import java.util.concurrent.*;
public class GFG {
public static void main(String[] args)
{
// create an ConcurrentLinkedQueue
ConcurrentLinkedQueue<Integer>
queue = new ConcurrentLinkedQueue<Integer>();
// Add Numbers to queue
queue.add(4353);
queue.add(7824);
queue.add(78249);
queue.add(8724);
// Displaying the existing ConcurrentLinkedQueue
System.out.println("ConcurrentLinkedQueue: " + queue);
// apply size()
int size = queue.size();
// print after applying size method
System.out.println("Size of ConcurrentLinkedQueue: " + size);
}
}
// Java Program Demonstrate size()// method of ConcurrentLinkedQueueimport java.util.concurrent.*;public class GFG { public static void main(String[] args) { // create an ConcurrentLinkedQueue ConcurrentLinkedQueue<Integer> queue = new ConcurrentLinkedQueue<Integer>(); // Add Numbers to queue queue.add(4353); queue.add(7824); queue.add(78249); queue.add(8724); // Displaying the existing ConcurrentLinkedQueue System.out.println("ConcurrentLinkedQueue: " + queue); // apply size() int size = queue.size(); // print after applying size method System.out.println("Size of ConcurrentLinkedQueue: " + size); }}
Output:
Example 2:
ConcurrentLinkedQueue: [4353, 7824, 78249, 8724] Size of ConcurrentLinkedQueue: 4
// Java Program Demonstrate size()
// method of ConcurrentLinkedQueue
import java.util.concurrent.*;
public class GFG {
public static void main(String[] args)
{
// create an ConcurrentLinkedQueue
ConcurrentLinkedQueue<String>
queue = new ConcurrentLinkedQueue<String>();
// Add String to queue
queue.add("Aman");
queue.add("Amar");
queue.add("Sanjeet");
queue.add("Rabi");
// Displaying the existing ConcurrentLinkedQueue
System.out.println("ConcurrentLinkedQueue: " + queue);
// apply size() on queue
int size = queue.size();
// print after applying size method
System.out.println("Size of ConcurrentLinkedQueue: "
+ size);
// removal of some elements
queue.poll();
queue.poll();
// get size of ConcurrentLinkedQueue again
size = queue.size();
// Displaying the existing ConcurrentLinkedQueue
System.out.println("After 2 removal of elements\n"
+ "ConcurrentLinkedQueue: " + queue);
// print after applying size method
System.out.println("Size of ConcurrentLinkedQueue: "
+ size);
}
}
// Java Program Demonstrate size()// method of ConcurrentLinkedQueueimport java.util.concurrent.*;public class GFG { public static void main(String[] args) { // create an ConcurrentLinkedQueue ConcurrentLinkedQueue<String> queue = new ConcurrentLinkedQueue<String>(); // Add String to queue queue.add("Aman"); queue.add("Amar"); queue.add("Sanjeet"); queue.add("Rabi"); // Displaying the existing ConcurrentLinkedQueue System.out.println("ConcurrentLinkedQueue: " + queue); // apply size() on queue int size = queue.size(); // print after applying size method System.out.println("Size of ConcurrentLinkedQueue: " + size); // removal of some elements queue.poll(); queue.poll(); // get size of ConcurrentLinkedQueue again size = queue.size(); // Displaying the existing ConcurrentLinkedQueue System.out.println("After 2 removal of elements\n" + "ConcurrentLinkedQueue: " + queue); // print after applying size method System.out.println("Size of ConcurrentLinkedQueue: " + size); }}
Output:
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html#size--
ConcurrentLinkedQueue: [Aman, Amar, Sanjeet, Rabi] Size of ConcurrentLinkedQueue: 4 After 2 removal of elements ConcurrentLinkedQueue: [Sanjeet, Rabi] Size of ConcurrentLinkedQueue: 2
