1. A deque (pronounced "deck") is a list-based collection that allows additions and removals to take place at both ends. A deque supports the operations addFront(x), removeFront( ), addRear(x), removeRear( ), size( ), and empty( ).
Write a class that implements a deque that stores strings using a doubly linked list that you code yourself. Demonstrate your class with a graphical user interface that allows users to manipulate the deque by typing appropriate commands in a JTextField component, and see the current state of the deque displayed in a JTextArea component. Consult the documentation for the JTextArea class for methods you can use to display each item in the deque on its own line.
2. Implement a deque as described in Programming Challenge 1, except base your implementation on an array. The constructor for the class should accept an integer parameter for the capacity of the deque and create an array of that size. Use a graphical user interface based on an array of text fields similar to what is shown in the figure below. Test your deque class by constructing a deque with capacity 10.