csc335 week 11 and 12

week 11

i)

a. In previous chapters, you have created several classes for Carly’s Catering. Now, create a new abstract class named Employee. The class contains data fields for an employee’s ID number, last name, first name, pay rate, and job title. The class contains get and set methods for each field; the set methods for pay rate and job title are abstract. Save the file as Employee.java.

b. Create three classes that extend Emp1oyee named Waitstaff, Bartender, and Coordinator. The method that sets the pay rate in each class accepts a parameter and assigns it to the pay rate, but no Waitstaff employee can have a rate higher than 10.00, no Bartender can have a rate higher than 14.00, and no Coordinator can have a rate higher than 20.00. The method that sets the job title accepts no parameters—it simply assigns the string waitstaff, bartender, or coordinator to the object appropriately. Save the files as Waitstaff.java, Bartender.java, and Coordinator.java.

c. In Chapter 10, you created a DinnerEvent class that holds event information, including menu choices. Modify the class to include an array of 15 Employee objects representing employees who might be assigned to work at a DinnerEvent. Include a method that accepts an Employee array parameter and assigns it to the Employee array field, and include a method that returns the Employee array. The filename is DinnerEvent.java.

d. Write an application that declares a DinnerEvent object, prompts the user for an event number, number of guests, menu options, and contact phone number, and then assigns them to the object. Also prompt the user to enter data for as many Employees as needed based on the number of guests. A DinnerEvent needs one Waitstaff Employee for every event, two if an event has 10 guests or more, three if an event has 20 guests or more, and so on. A DinnerEvent also needs one Bartender for every 25 guests and one Coordinator no matter how many guests attend. All of these Employees should be stored in the Employee array in the DinnerEvent object. (For many events, you will have empty Employee array positions.) After all the data values are entered, pass the DinnerEvent object to a method that displays all of the details for the event, including all the details about the Emp1oyees assigned to work. Save the program as StaffDinnerEvent.java.

Create a zip file of the .java file(s) and submit the assignment.

ii)

a. In previous chapters, you have created several classes for Sammy’s Seashore Supplies. Now, Sammy has decided to restructure his rates to include different fees for equipment types in addition to the fees based on rental length, and to charge for required lessons for using certain equipment. Create an abstract class named Equipment that holds fields for a numeric equipment type, a String equipment name, and a fee for renting the equipment. Include a final array that holds the equipment names—personal watercraftski, pontoon boat, rowboat, canoe, kayak, beach chair, umbrella, and other. Also include a final array that includes the surcharges for each equipment type— $50, $40, $15, $12, $10, $2, $1, and $0, respectively. Include a constructor that requires an equipment type and sets the field to the type unless it is out of range, in which case the type is set to the other code. Include get and set methods for each field and include an abstract method that returns a String explaining the lesson policy for the type of equipment. Save the file as Equipment.java.

b. Create two classes that extend Equipment—EquipmentWithoutLesson and EquipmentWithLesson. The constructor for each class requires that the equipment type be in range—that is, personal watercraft, pontoon boats, rowboats, canoes, and kayaks are EquipmentWithLesson objects, but other equipment types are not. In both subclasses, the constructors set the equipment type to other if it is not in range. The constructors also set the equipment fee, as described in part 2a. Each subclass also includes a method that returns a message indicating whether a lesson is required, and the cost ($27) if it is. Save the files as EquipmentWithoutLesson.java and EquipmentWithLesson.java.

c. In Chapter 8, you created a Rental class. Now, modify it to contain an Equipment data field and an additional price field that holds a base price before equipment fees are added. Remove the array of equipment Strings from the Renta1 class as well as the method that returns an equipment string. Modify the Renta1 constructor so that it requires three parameters: contract number, minutes for the rental, and an equipment type. The method that sets the hours and minutes now sets a base price before equipment fees are included. Within the constructor, set the contract number and time as before, but add statements to create either an EquipmentWithLesson object or an EquipmentWithoutLesson object, and assign it to the Equipment data field. Assign the sum of the base price (based on time) and the equipment fee (based on the type of equipment) to the price field. Save the file as Rental.java.

d. In Chapter 8, you created a Renta1Demo class that displays details for four Rental objects. Modify the class as necessary to use the revised Rental class that contains an Equipment field. Be sure to modify the method that displays details for the Renta1 to include all the pertinent data for the equipment. Save the file as RentalDemo.java.

Create a zip file of the .java file(s) and submit the assignment.

Week 12

I)

In Chapter 11, you created an interactive StaffDinnerEvent class that obtains all the data for a dinner event for Carly’s Catering, including details about the staff members required to work at the event. Now, modify the class so that it becomes immune to user data entry errors by handling exceptions for each numeric entry. Each time the program requires numeric data—for example, for the number of guests, selected menu options, and staff members’ salaries—continuously prompt the user until the data entered is the correct type. Save the revised program as guests, selected menu options, and staff members’ salaries—continuously prompt the user until the data entered is the correct type. Save the revised program as StaffDinnerEvent.java.

Create a zip file of the .java file(s) and submit the assignment.

ii) In Chapter 11, you created an interactive RentalDemo class that obtains all the data for four rentals from Sammy’s Seashore Rentals, including details about the contract number, length of the rental, and equipment type. Now, modify the class so that it becomes immune to user data entry errors by handling exceptions for each numeric entry. Each time the program requires numeric data—for example, for the rental period—continuously prompt the user until the data entered is the correct type. Save the revised program as RentalDemo.java.

Create a zip file of the .java file(s) and submit the assignment.

In Chapter 11, you created an interactive RentalDemo class that obtains all the data for four rentals from Sammy’s Seashore Rentals, including details about the contract number, length of the rental, and equipment type. Now, modify the class so that it becomes immune to user data entry errors by handling exceptions for each numeric entry. Each time the program requires numeric data—for example, for the rental period—continuously prompt the user until the data entered is the correct type. Save the revised program as RentalDemo.java.

Create a zip file of the .java file(s) and submit the assignment.

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