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ConcurrentLinkedDeque offerLast() Method in Java

Last Updated : 26 Nov, 2018
The java.util.concurrent.ConcurrentLinkedDeque.offerLast() method is an inbuilt method in Java which inserts the specified element, passed as a parameter, to the end of the deque. Syntax: 
Conn_Linked_Deque.offerLast(Object elem)
Parameters: The method accepts a parameter elem which species the element to be inserted to the end of the deque. Return Value: The function returns True if the element is successfully added into the deque and returns False otherwise. Exception: The function throws a NullPointerException if the passed parameter is NULL. Below programs illustrate the ConcurrentLinkedDeque.offerLast() method: Program 1:
Output: 
Elements in Deque: [Welcome, To, Geeks, 4, Geeks]
The Last element is: Geeks
The Inserted element is: GFG
Elements in Deque: [Welcome, To, Geeks, 4, Geeks, GFG]
The Last element is: GFG
Program 2:
Output: 
Elements in Deque: [12, 43, 29, 16, 70]
The Last element is: 70
java.lang.NullPointerException
The Inserted element is: 24
Elements in Deque: [12, 43, 29, 16, 70, 24]
The Last element is: 24
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentLinkedDeque.html#offerLast()
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