Inserts the specified element at the end of this deque if it is
possible to do so immediately without violating capacity restrictions,
throwing an {@code IllegalStateException} if no space is currently
available. When using a capacity-restricted deque, it is generally
preferable to use method {@link #offerLast}.
<p>This method is equivalent to {@link #add}.
@param e the element to add
@throws IllegalStateException if the element cannot be added at this
time due to capacity restrictions
@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
Inserts the specified element at the end of this deque if it is possible to do so immediately without violating capacity restrictions, throwing an {@code IllegalStateException} if no space is currently available. When using a capacity-restricted deque, it is generally preferable to use method {@link #offerLast}.
<p>This method is equivalent to {@link #add}.
@param e the element to add @throws IllegalStateException if the element cannot be added at this time due to capacity restrictions @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