The
add(E e) method of
BlockingDeque inserts the element passed in the parameter to the end of the Deque is there is space. If the BlockingDeque is capacity restricted and no space is left for insertion, it returns an
IllegalStateException. It works exactly in the same way as addLast() method does.
Syntax:
public void add(E e)
Parameters: This method accepts a mandatory parameter
e which is the element to be inserted in the end of the BlockingDeque.
Returns: This method does not returns anything.
Exception:
- IllegalStateException: if the element cannot be added at this time due to capacity restrictions
- NullPointerException: if the specified element is null
Note: The add() method of
BlockingDeque has been inherited from the
LinkedBlockingDeque class in Java.
Below programs illustrate add() method of Deque:
Program 1:
Output:
Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Program 2:
Output:
Exception in thread "main" java.lang.IllegalStateException: Deque full
at java.util.concurrent.LinkedBlockingDeque.addLast(LinkedBlockingDeque.java:335)
at java.util.concurrent.LinkedBlockingDeque.add(LinkedBlockingDeque.java:633)
at GFG.main(GFG.java:24)
Program 3:
