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LinkedBlockingDeque takeLast() method in Java

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  • Last Updated : 26 Nov, 2018
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The takeLast() method of LinkedBlockingDeque returns and removes the tail of the Deque container from it. The method throws an InterruptedException if it is interrupted while waiting.

Syntax:

public E takeLast()

Returns: This method returns the tail(last element) of the Deque container.

Exception: The function throws an InterruptedException if it is interrupted while waiting.

Below programs illustrate takeLast() method of LinkedBlockingDeque:

Program 1:




// Java Program to demonstrate takeLast()
// 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 last element and prints it
        System.out.println("Head of Linked Blocking Deque: "
                           + LBD.takeLast());
  
        // prints the Deque
        System.out.println("Linked Blocking Deque: " + LBD);
    }
}

Output:

Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Head of Linked Blocking Deque: 74381793
Linked Blocking Deque: [7855642, 35658786, 5278367]

Program 2:




// Java Program to demonstrate takeLast()
// 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);
  
        LBD.clear();
  
        // throws error as the list is empty and it
        // is interrupted while waiting
        System.out.println("Head of Linked Blocking Deque: "
                           + LBD.takeLast());
    }
}

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/8/docs/api/java/util/concurrent/LinkedBlockingDeque.html#takeLast–


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