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ArrayBlockingQueue poll() Method in Java
The poll() method of the ArrayBlockingQueue class in Java retrieves and removes the head of this queue, or returns null if this queue is empty.
The syntax is as follows:
E poll()
To work with ArrayBlockingQueue class, you need to import the following package:
import java.util.concurrent.ArrayBlockingQueue;
The following is an example to implement poll() method of Java ArrayBlockingQueue class:
Example
import java.util.concurrent.ArrayBlockingQueue;
public class Demo {
public static void main(String[] args) throws InterruptedException {
ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<Integer>(10);
q.add(200);
q.add(310);
q.add(400);
q.add(450);
q.add(500);
q.add(550);
q.add(700);
System.out.println("ArrayBlockingQueue = " + q);
System.out.println("Head of the queue = "+q.poll());
System.out.println("Head of the queue now = "+q.poll());
System.out.println("ArrayBlockingQueue = " + q);
}
}Output
ArrayBlockingQueue = [200, 310, 400, 450, 500, 550, 700] Head of the queue = 200 Head of the queue now = 310 ArrayBlockingQueue = [400, 450, 500, 550, 700]
Updated on: 30-Jul-2019
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