Pops an element from the stack represented by this deque. In other
words, removes and returns the first element of this deque.
<p>This method is equivalent to {@link #removeFirst()}.
@return the element at the front of this deque (which is the top
of the stack represented by this deque)
@throws NoSuchElementException if this deque is empty
Pops an element from the stack represented by this deque. In other words, removes and returns the first element of this deque.
<p>This method is equivalent to {@link #removeFirst()}.
@return the element at the front of this deque (which is the top of the stack represented by this deque) @throws NoSuchElementException if this deque is empty