import java.util.Deque;
import java.util.LinkedList;

/*
 *  Example of getLast() and peekLast() methods.
 */
public class DequeExample
{

    public static void main( String[] args )
    {
        Deque<Integer> deque = new LinkedList<Integer>();
        deque.add(100);
        deque.add(200);
        deque.add(300);
        deque.add(400);

        System.out.println("deque : " + deque + "\n");

        /*
         * Retrieves, but does not remove, the last element of this deque. This
         * method differs from peekLast only in that it throws an exception if
         * this deque is empty.
         */
        Integer element = deque.getLast();

        System.out.println("element : " + element);
        System.out.println("deque : " + deque + "\n");

        /*
         * Retrieves, but does not remove, the last element of this deque, or
         * returns null if this deque is empty.
         */
        element = deque.peekLast();
        System.out.println("element : " + element);
        System.out.println("deque : " + deque + "\n");

    }
}