BlockingDeque take() method in Java with Examples
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()
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