Deque.offerFirst

Inserts the specified element at the front of this deque unless it would violate capacity restrictions. When using a capacity-restricted deque, this method is generally preferable to the {@link #addFirst} method, which can fail to insert an element only by throwing an exception.

@param e the element to add @return {@code true} if the element was added to this deque, else {@code false} @throws ClassCastException if the class of the specified element prevents it from being added to this deque @throws NullPointerException if the specified element is null and this deque does not permit null elements @throws IllegalArgumentException if some property of the specified element prevents it from being added to this deque