LinkedBlockingQueue clear() method in Java
The clear() method of LinkedBlockingQueue removes all of the elements from this queue. After applying this method the queue will become empty.
Syntax:
public void clear()
Below programs illustrates clear() method of LinkedBlockingQueue class:
Program 1:
// Java Program Demonstrate clear()// method of LinkedBlockingQueue  import java.util.concurrent.LinkedBlockingQueue;  public class GFG {      public static void main(String[] args)    {        // define capacity of LinkedBlockingQueue        int capacityOfQueue = 50;          // create object of LinkedBlockingQueue        LinkedBlockingQueue<Integer> linkedQueue            = new LinkedBlockingQueue<Integer>(capacityOfQueue);          // Add element to LinkedBlockingQueue        linkedQueue.add(2300);        linkedQueue.add(1322);        linkedQueue.add(8945);        linkedQueue.add(6512);          // print queue        System.out.println("LinkedBlockingQueue before using"                           + " clear() : " + linkedQueue);          // Apply clear() method        linkedQueue.clear();          // print queue        System.out.println();        System.out.println("LinkedBlockingQueue after using"                           + " clear() method : " + linkedQueue);    }} |
Output:
LinkedBlockingQueue before using clear() : [2300, 1322, 8945, 6512] LinkedBlockingQueue after using clear() method : []
Program 2:
// Java Program Demonstrate clear()// method of LinkedBlockingQueue  import java.util.concurrent.LinkedBlockingQueue;  public class GFG {      public static void main(String[] args)    {        // define capacity of LinkedBlockingQueue        int capacityOfQueue = 50;          // create object of LinkedBlockingQueue        LinkedBlockingQueue<String> names            = new LinkedBlockingQueue<String>(capacityOfQueue);          // Add element to ArrayBlockingQueue        names.add("Shubham");        names.add("Siddhant");        names.add("Mahafuj");        names.add("Arka");        names.add("Raunak");          // print queue        System.out.println("LinkedBlockingQueue before using"                           + " clear() : " + names);          // Apply clear() method        names.clear();          // print queue        System.out.println();        System.out.println("LinkedBlockingQueue after using"                           + " clear() method : " + names);    }} |
Output:
LinkedBlockingQueue before using clear() : [Shubham, Siddhant, Mahafuj, Arka, Raunak] LinkedBlockingQueue after using clear() method : []
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/LinkedBlockingQueue.html#clear–
