The
ConcurrentLinkedQueueis a thread-safe unbounded queue. It is ordered by. The elements are inserted at the tail (end) and retrieved from the head (start) of the queue. The FIFO First-In-First-Out nullelements are not allowed as an element of the queue. We can use theConcurrentLinkedQueuewhen multiple threads are sharing a single Queue.
The ConcurrentLinkedQueue.clear method can be used to delete all the elements of a ConcurrentLinkedQueue object.
public void clear()
This method doesn’t take any arguments.
This method is of the void type, so it doesn’t return any value.
The code below demonstrates how to use the clear method.
import java.util.concurrent.ConcurrentLinkedQueue;class Clear {public static void main( String args[] ) {ConcurrentLinkedQueue<String> queue = new ConcurrentLinkedQueue<>();queue.add("1");queue.add("2");queue.add("3");System.out.println("The queue is " + queue);queue.clear();System.out.println("After calling the clear method the deque is " + queue);}}
In the above code:
In line 1, we imported the ConcurrentLinkedQueue from the java.util.concurrent package.
In line 4, we created an object for the ConcurrentLinkedQueue class with the name queue.
In line 5-7, we added three elements to the queue object using the ConcurrentLinkedQueue.add() method.
In line 10, we called the clear method of the queue object. This will remove all the elements from the queue and make the queue empty.