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()