Problem
Creating a Cellular Phone Keypad Applet
The Web Phone company now would like an applet that represents a cellular phone keypad. As you did in Programming Assignment 2 on page 426, create an applet that displays a text area across the top of the window, similar to the LCD panel of most cellular phones. Include buttons for the 10 digits, a star key (*), and a pound key (#). When clicked, the appropriate digit or symbol should display in the text area. No additional functionality is required until Web Phone approves your prototype.
Text Book: Java Programming: Comprehensive Concepts and Techniques By Gary B. Shelly, Thomas J. Cashman, Joy L. Starks, Michael Mick.