Create a class named AppointmentKeeper that stores a two-dimensional String array with 3...

Create a class named AppointmentKeeper that stores a two-dimensional String array with 31 rows and 24 columns. The program allows a user to choose a day and an hour continuously and then to enter a String value that describes an appointment. After the user finishes entering data, prompt the user continuously to enter a day, and show the 24 appointment slots for the day. Save the file as AppointmentKeeper.java. Figure 9-29 shows part of a typical execution.