Java LinkedBlockingDeque addFirst() method

The addFirst() method of LinkedBlockingDeque class inserts the specified element at the front of this LinkedBlockingDeque. This method throws IllegalStateException if the specified element is null.

Syntax:

Parameters:

e- It is the element to add

Specified By:

The addFirst() method of ConcurrentLinkedQueue class is specified by :

1. addFirst in interface BlockingDeque<E>
2. addFirst in interface Deque<E>.

Throws:

NullPointerException: This exception will throw if the specified element e is null.

IllegalStateException: This exception will throw if this deque is full.

Example 1

Output:

[1, 2, 3, 4, 5]
After inserting 10 at first position
[10, 1, 2, 3, 4, 5]

Example 2

Output:

1. Disha
2. Tanmay
3. Prachi
4. Garvit
After adding string :
1. Diya
2. Disha
3. Tanmay
4. Prachi
5. Garvit

Example 3

Output:

Exception in thread "main" java.lang.IllegalStateException: Deque full
	at java.util.concurrent.LinkedBlockingDeque.addFirst(LinkedBlockingDeque.java:326)
	at com.javaTpoint.LinkedBlockingDequeAddFirstExample3.main
	(LinkedBlockingDequeAddFirstExample3.java:13)