a. Yummy Catering provides meals for parties and special events. In previous chapters, you have developed an Event class that holds catering event information. Now modify the Event class as follows:
❯❯Modify the method that sets the event number in the Event class so that if the argument passed to the method is not a four character String that starts with a letter followed by three digits, then the event number is forced to A000. If the initial letter in the event number is not uppercase, force it to be so.
❯❯Add a contact phone number field to the Event class.
❯❯Add a set method for the contact phone number field in the Event class. Whether the user enters all digits or any combination of digits, spaces, dashes, dots, or parentheses for a phone number, store it as all digits. (Assume a phone number is 10 digits and does not require a leading digit that might be needed when dialing.) For example, if the user enters (920) 872-9182, store the phone number as 9208729182. If the user enters a number with fewer or more than 10 digits, store the number as 0000000000.
❯❯Add a get method for the phone number field. The get method returns the phone number as a String constructed as follows: parentheses surround a three-digit area code, followed by a space, followed by the three-digit phone exchange, followed by a hyphen, followed by the last four digits of the phone number. Save the file as Event.java.
b. Create an EventDemo application that does the following:
❯❯Prompts the user for event numbers and numbers of guests and constructs three Event objects.
❯❯Prompts the user for and retrieves a contact phone number for each of the Event objects.
❯❯Displays the event number and contact phone number for each Event. Save the file as EventDemo.java.