Reference no: EM132327766

Programming Fundamentals Assignment - JAVA Program using array of objects

Details - For this assignment, you are required to develop a Windowed GUI Java Program to demonstrate you can use Java constructs including input/output via a GUI interface, Java primitive and built-in types, Java defined objects, arrays, selection and looping statements and various other Java commands. Your program must produce the correct results.

The code for the GUI interface is supplied and is available on the unit website, you must write the underlying code to implement the program. The command buttons are linked to appropriate methods in the given code. Please spend a bit of time looking at the given code to familiarise yourself with it and where you have to complete the code. You will need to write comments in the supplied code as well as your own additions.

What to submit for this assignment -

The Java source code: You will need to submit two source files: Order.java and RockyDryCleanersGUI.java, please submit these files as a single zip file. Only include your source code in the zip file you must submit your report separately.

Assignment Specification -

In assignment one we read in multiple customer names and number of garments using both Scanner and GUI dialogs. In this assignment we are going to read in the data and output the information via a GUI interface. The code for the GUI interface called RockyDryCleanersGUI.java is supplied (via the Moodle web site), this has the basic functionality of the interface and you need to use this for your program. We are also going to store the information in an array of Order objects.

Look at the code supplied and trace the execution and you will see the buttons are linked to blank methods (stubs) which you will implement the various choices via the buttons.

The GUI interface contains three JLabels for the heading and the prompts. There are two JTextFields in which the customer name and number of garments are entered. There is also a JTextArea for displaying the output.

Four JButtons are at the bottom which link to blank methods for implementing the functionality of the application.

Order class - First step is to create a class called Order (Order.java) which will not contain a main.

The Order class will be very simple which will contain two private instance variables:

• customerName as a String
• garments as an integer

The following public methods will have to be implemented:

• A default constructor
• A parameterised constructor
• Two set methods (mutators)
• Two get methods (accessors)
• calculateCharge value returning method*

*You will create a public value returning method calculateCharge(), the order charges can be derived from the instance variable garments. Typically we do not store calculated values in a database so the charge will be derived via your calculateCharge() method. Do not store the charge as an instance variable.

The method will be similar to calculateCharge method from assignment one, with the same scale of pricing based on the number of garments. You can use the code from assignment one.

One to two garments: $8.50 per garment.

Three garments: $20.00.

More than three garments: $20.00 plus $6.50 per garment after that.

You should use the following method header: public double calculateCharge()

Note: you do not need to pass garments as a parameter as you can access the instance variable garments directly.

RockyDryCleanersGUI class

Once the Order class is implemented and fully tested we can now start to implement the functionality of the GUI interface.

Data structures

For this assignment we are going to store the customer names, number of garments in an array of Order objects. Do not use the ArrayList data structure.

Declare an array of order objects as an instance variable of RockyDryCleanersGUI class, the array should hold ten entries. Use a constant for the maximum entries allowed.

private Order [] orderArray = new Order[MAX_ORDERS];

We need another instance variable (integer) to keep track of the number of orders being entered and use this for the index into the array of Order objects.

private int currentOrder = 0;

Attachment:- Assignment File.rar