The take() method of LinkedBlockingDeque returns and removes the head of the Deque container from it. The method throws an InterruptedException if it is interrupted while waiting.
Syntax:
public E take()
Returns: This method returns the head of the Deque container.
Exception: The function throws a InterruptedException if it is interrupted while waiting.
Below programs illustrate take() method of LinkedBlockingDeque:
Program 1:
// Java Program to demonstrate take()// method of LinkedBlockingDeque  import java.util.concurrent.LinkedBlockingDeque;import java.util.*;  public class GFG {    public static void main(String[] args)        throws InterruptedException    {          // create object of LinkedBlockingDeque        LinkedBlockingDeque<Integer> LBD            = new LinkedBlockingDeque<Integer>();          // Add numbers to end of LinkedBlockingDeque        LBD.add(7855642);        LBD.add(35658786);        LBD.add(5278367);        LBD.add(74381793);          // print Dequeue        System.out.println("Linked Blocking Deque: " + LBD);          // removes the front element and prints it        System.out.println("Head of Linked Blocking Deque: "                           + LBD.take());          // prints the Deque        System.out.println("Linked Blocking Deque: " + LBD);    }} |
Output:
Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793] Head of Linked Blocking Deque: 7855642 Linked Blocking Deque: [35658786, 5278367, 74381793]
Program 2: To demonstrate InterruptedException
// Java Program to demonstrate take()// method of LinkedBlockingDeque  import java.util.concurrent.LinkedBlockingDeque;import java.util.*;  public class GFG {    public static void main(String[] args)        throws InterruptedException    {          // create object of LinkedBlockingDeque        LinkedBlockingDeque<Integer> LBD            = new LinkedBlockingDeque<Integer>();          // print Dequeue        // the Deque is empty        System.out.println("Linked Blocking Deque: " + LBD);          try {            // throws error as the list is empty            // and it is interrupted while waiting            System.out.println("Head of Linked Blocking Deque: "                               + LBD.take());        }        catch (Exception e) {            System.out.println("Exception: " + e);        }    }} |
RuntimeException:
Max real time limit exceeded due to either by heavy load on server or by using sleep function.
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/LinkedBlockingDeque.html#take–
