The take() method of BlockingDeque 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.
Note: The take() method of BlockingDeque has been inherited from the LinkedBlockingDeque class in Java.
Below programs illustrate take() method of BlockingDeque:
Program 1:
// Java Program to demonstrate take()// method of LinkedBlockingDeque import java.util.concurrent.LinkedBlockingDeque;import java.util.concurrent.BlockingDeque;import java.util.*; public class GFG { public static void main(String[] args) throws InterruptedException { // create object of BlockingDeque BlockingDeque<Integer> BD = new LinkedBlockingDeque<Integer>(); // Add numbers to end of BlockingDeque BD.add(7855642); BD.add(35658786); BD.add(5278367); BD.add(74381793); // print Deque System.out.println("Blocking Deque: " + BD); // removes the front element and prints it System.out.println("Head of Blocking Deque: " + BD.take()); // prints the Deque System.out.println("Blocking Deque: " + BD); }} |
Output:
Blocking Deque: [7855642, 35658786, 5278367, 74381793] Head of Blocking Deque: 7855642 Blocking Deque: [35658786, 5278367, 74381793]
Program 2: To demonstrate InterruptedException
// Java Program to demonstrate take()// method of BlockingDeque import java.util.concurrent.LinkedBlockingDeque;import java.util.concurrent.BlockingDeque;import java.util.*; public class GFG { public static void main(String[] args) throws InterruptedException { // create object of BlockingDeque BlockingDeque<Integer> BD = new LinkedBlockingDeque<Integer>(); // print Dequeue // the Deque is empty System.out.println("Blocking Deque: " + BD); try { // throws error as the list is empty // and it is interrupted while waiting System.out.println("Head of Blocking Deque: " + BD.take()); } catch (Exception e) { System.out.println("Exception: " + e); } }} |
Runtime Errors:
Max real time limit exceeded due to either by heavy load on server or by using sleep function.
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingDeque.html#take()
