Programming 1 Semester 1, 2014 Assignment 3

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1 Programming 1 Semester 1, 2014 Assignment 3 Authors: Daryl D Souza, Craig Hamilton Total raw marks: 150 Assignment weight: 20% NOTE: This assignment is to be undertaken individually no group work is permitted. Background information This assignment is an exercise in simple, object-oriented programming and, accordingly, you should adhere to basic-object oriented programming guidelines when designing and writing your classes, such as: a) Setting the visibility of all instance variables to private. b) Setting the visibility of all methods in your classes to public c) Encapsulating both the data for a class and the methods that work with and/or manipulate that data within the same class. In this assignment we are focusing on extending the bookings class for vehicles encountered in Assignment 2. The ferry company has a two-tiered pricing scheme which caters for passenger vehicles and larger recreational vehicles (eg. four wheel drive vehicles or campervans) as follows: A ferry booking for a passenger vehicle costs $150 and optionally includes insurance coverage under the ferry company s insurance policy for an additional $50 (discussed previously in Assignment 2). A ferry booking for a recreational vehicle may cost more due to the larger size of most recreational vehicles. In such cases a surcharge, calculated on the basis of the weight of the vehicle, may be applicable. Details are as follows. Recreational vehicles weighing 2000kg or less are charged the same basic fee as a passenger car (i.e. $150 + optional $50 for insurance). Recreational vehicles weighing more than 2000kg are charged an additional surcharge on top of the basic CarBooking fee of $0.10 for each additional kg over 2000 (to reflect the additional size of a recreational vehicle compared to a normal passenger vehicle). eg. for a vehicle weighing 2600kg with insurance included the fee charged would end up being $260 in total ($150 + $50 + ( ) * $0.10). You are required to design and implement an object-oriented program that models some basic functionality required in such a ferry ticketing system.

2 Part A: RVBooking class implementation ( = 60 Marks) The only additional information required for a recreational vehicle, on top of that already being maintained for a passenger car, is the weight of the recreational vehicle, which will determine the surcharge, if any, to be added to the basic booking fee. You should address this new requirement by designing and implementing a RVBooking class (which extends the CarBooking class of Assignment 2), which includes the required additional features as follows: (i) Define a new instance variable for the weight of the recreational vehicle (an int). NOTE: You should not redefine any of the instance variables defined initially in the CarBookin) superclass in this RVBooking subclass. (ii) Define a constructor that accepts the booking ID, registration, description, and weight, for the new RVBooking as parameters, and stores the information in the corresponding instance variables. NOTE: You should use the super() facility to pass on the relevant parameters (ID, registration and description) to the superclass constructor. (iii) Define an accessor for the weight of the recreational vehicle. (iv) Override the method public void getbookingfee() so that it calculates and returns the total cost of the RVBooking, based on the basic fee for a CarBooking and extra surcharge for recreational vehicles that exceed the prescribed weight limit (2000kg). NOTE: You will need to use the super reference to invoke the getbookingfee() method from the superclass in order to obtain the basic booking fee amount, when calculating the total booking fee for a recreational vehicle. (v) Override the method public void display() to display a summary of all of the details (instance variables) for the current RVBooking. NOTE: The overriding version of the display() method in the RVBooking class will need to use the super reference to invoke the corresponding method from the CarBooking superclass, in order to display the CarBooking details first. The details of the RVBooking object should be printed in a neat format (an example is shown in the screenshots provided later.

3 Part B: Using the Data Classes ( = 80 Marks) For this part of the assignment you need to write a menu-driven application that creates, stores and provides various reports of the mixture of CarBooking and RVBooking objects stored. The skeleton code or the menu driver will be provided but you may already work on the coded solutions requested as per details below. You will need to address the following points in your application class main method: (i) Define an array of CarBooking references that can store up to ten objects (elements). (ii) Menu option 1: Create the CarBooking and RVBooking objects specified below and store them in an array of CarBooking references mentioned above. You should NOT hard code this data as you did in Assignment 2. You must create a loop to enter the data interactively and then pass the values shown below as arguments to the constructor when creating each of the objects. Type Booking ID Vehicle Description Weight Registration RVBooking B001 NIS-001 Nissan Murano 1820 CarBooking B002 HOL-002 Holden Astra RVBooking B003 MIT-003 Mitsubishi Pajero 2310 RVBooking B004 FOR-004 Ford Territory 2145 CarBooking B005 BMW-005 BMW 318i CarBooking B006 MER-006 Mercedes-Benz C180 Note that the sequence and/or format of the CarBooking and RVBooking IDs and registration numbers shown above serves only as an example there is no requirement to ensure that the booking IDs or registration numbers are sequential or formatted in any particular way (however, you should use the data provided in the table when creating your objects). Also note that the Type field in the table above is only there to indicate the type of object you should be creating for each position in the array you do not need to store Type explicitly (i.e. there should not be an instance variable for Type in either the CarBooking or RVBooking classes). (iii) Menu option 2: Implement a code segment (feature) to display the booking IDs and registration numbers for all CarBooking/RVBooking objects by using a loop to step through each of the objects in the array and invoking the corresponding booking ID and registration accessors for each object. A sample display is as follows. List of CarBooking ID's and names: B001, Registration No: NIS-001 B002, Registration No: HOL-002 B003, Registration No: MIT-003 B004, Registration No: FOR-004 B005, Registration No: BMW-005 B006, Registration No: MER-006

4 (iv) Menu option 3: Implement another code segment (feature) which repeatedly prompts the user for a booking ID and searches for an object in the array with the given ID, and then displays the total cost of the booking, if the object is found. If not found with the given ID is not found, an appropriate message must be displayed. This feature should function in a manner similar to the example shown below. Booking Fee Retrieval: Enter the booking ID: B001 Fee for booking B001 is RVBooking object with weight under 2000kg Enter the booking ID: B003 Fee for booking B003 is Enter the booking ID: B005 Fee for booking B005 is RVBooking object with weight over 2000kg Enter the booking ID: B062 Error! Booking ID not found! Enter the booking ID: Note: program should terminate at this point User enters a blank line (v) Menu option 4: Implement another code segment (feature) to display the weight of each of the RVBooking objects stored in the array by appropriately invoking the weight accessor for each RVBooking. NOTE: You MUST use a loop to search through the entire array and identify the RVBooking objects (using the instanceof operator) programs that directly identify the RVBooking objects by their position in the array (ie. no searching is performed) will NOT receive marks for this feature. You will also need to typecast the reference (element) in the array for each RVBooking object you find, in order to call the weight accessor for the object in question. (vi) Menu option 5: Implement a final code segment which uses a loop to step through the array of objects and displays the details for each object by appropriately invoking the display() method defined in the data classes. NOTE: The display() method should be invoked in a polymorphic manner there is no need to identify which type of object the details are being displayed for each time the display() method is called. A sample screenshot showing the expected level of detail is shown on the next page. Note that none of the booking fees will include the insurance charge as the application does not add insurance to any of the CarBooking or RVBooking objects for this assignment.

5 B001 NIS-001 Nissan Murano Weight: 1820 B002 HOL-002 Holden Astra B003 MIT-003 Mitsubishi Pajero Booking Fee: $ Weight: 2310 B003 FOR-004 Ford Territory Booking Fee: $ Weight: 2140 B005 BMW-005 BMW 318i B006 MER-006 Mercedes-Benz C180