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LinkedBlockingDeque removeLast() method in Java
  • Last Updated : 26 Nov, 2018

The removeLast() method of LinkedBlockingDeque returns and removes the element at tail of the Deque container. The method throws an NoSuchElementException if the Deque container is empty.

Syntax:

public E removeLast()

Parameters: This method does not accepts any parameter.

Returns: This method returns the tail of the Deque container.

Exception: The function throws a NoSuchElementException if the Deque is empty.



Below programs illustrate removeLast() method of LinkedBlockingDeque:

Program 1:




// Java Program to demonstrate removeLast()
// 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("Linked Blocking Deque: " +      
                        LBD.removeLast());
  
        // prints the Deque
        System.out.println("Linked Blocking Deque: " + LBD);
    }
}
Output:
Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Linked Blocking Deque: 74381793
Linked Blocking Deque: [7855642, 35658786, 5278367]

Program 2:




// Java Program to demonstrate removeLast()
// method of LinkedBlockingDeque
  
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
        throws NoSuchElementException
    {
  
        // 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);
  
        // Deque is empty
        LBD.clear();
  
        // throws an exception
        LBD.removeLast();
    }
}

Output:

Exception in thread "main" java.util.NoSuchElementException
    at java.util.concurrent.LinkedBlockingDeque.removeLast(LinkedBlockingDeque.java:462)
    at GFG.main(GFG.java:29)

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/LinkedBlockingDeque.html#removeLast–

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