Follow the instructions and reference should be in Harvard style
Objectives
- Analyse, develop, and implement software solutions
- Choose and compare appropriate data structures in program design
- Apply classes, inheritance, polymorphism, and exception handling
- Test software implementations to ensure correctness and maintainability
Assessment Task
In this assignment, you are required to write a Java Application that uses an interactive Graphical User Interface (GUI) based on the JFrame class using SWING GUI components. You will also be designing and implementing the software solution using appropriate data structures and application of classes, inheritance, and exception handling. The case study for developing a solution is given below.
The food consumption of a person is to meet the daily energy requirements. The energy requirement is estimated using a person's age group, gender, height, weight, Basal metabolic rate (BMR), and physical activity level (PAL). There are data available on estimated energy requirements for various PALs, and BMR. So by choosing the correct age group, gender, height and PAL, the energy requirements can be found from the data set. Your task is to develop a Java Application that lets the user to enter height and choose gender, age group, and the most suitable PAL so that the application displays the energy requirements in Mega Joules. The application should contain a GUI as shown below. The GUI components should consist of the following panels.
1. A top panel that contains four (4) Text Fields, one Password Field, two Combo Boxes (drop down list), seven Labels, and two Radio Buttons and a Login command button.
2. A middle panel that contains a Text area to display the user's estimated energy requirement details.
3. A bottom panel that contains four Buttons which are "Load Data" Button, "Display Energy" Button, "Clear Display" Button and "Quit" Button.
The functions of four buttons are described below.
1. Load Data
Initially the ‘Load Data' Button remains disabled as shown in Figure 1. To enable it the user enters the name and password using the fields on the GUI, and clicks the
Login button. The Load Data Button can be used to read the data file which contains height, weight, BMR, and energy requirements for various PALs for males and females in the age groups of 19-30, and 31-50. After loading the file, fill the Combo Box with the description of PAL as given in the table below. Also, the Age group Combo Box is filled with the list of age groups read from the file. One row in
Table 1 PAL Description and Value
|
Description
|
Value
|
|
bed rest
|
1.2
|
|
very sedentary
|
1.4
|
|
light
|
1.6
|
|
moderate
|
1.8
|
|
heavy
|
2
|
|
vigorous
|
2.2
|
the file contains data for one age group, but for both genders.
Note: Use the given data file named COIT20256Ass1Data.csv available on the course website and it contains the set of data.
Figure 1: Initial Screen Display
2. Display Energy
Before clicking on the "Display Energy" button, the user has to enter his/her height in the Text Field, choose the gender by clicking the Radio button and select the age group. This should display the ‘Expected Average Weight' for that height in the Text Field as provided in the file. When user clicks ‘Display Energy' after selecting a suitable PAL from the drop down list, the corresponding PAL number should be displayed on the Text Field and energy requirements in the Text Area.
3. Clear Display
Clicking on the "Clear Display" button should clear all contents from the display area and set the Text Fields and Combo Boxes to their default values.
Figure 2: Screen Display After Load Data
Figure 3: Screen Display on Clicking "Display Rosters"
4. Quit
The "Quit" button should allow the user to exit from the application.
Data Structures.
You can use the classes given below as a guideline for your design.
1. enum PAL - Physical Activity Level: The descriptions and corresponding values of PALs are modelled as an enum. This is already completed and provided for your use in the course website in file, PAL.java
2. PALdata class
This is to store the PAL and corresponding energy requirement. This class is already completed and provided for your use in the course website in file, PALdat.java
3. BMRdata class
The purpose of this class is to store the values of age group, gender, height, weight, and bmr read from each row of the file.
a) Include appropriate fields to store:
Height, weight, bmr which are real numbers to be stored in float data type, age group and gender which are strings.
b) A constructor and necessary accessor and mutator methods to get and set values
c) A toString() method that displays the BMRdata attributes.
4. EnergyData Class
a) This class should have the fields to store:
BMRdata, and set of energy needs for various PALs corresponding to the BMRdata. This could be stored as an ArrayList of PALdata.
b) It should also include constructor, mutator, and accessor methods,
c) A toString() method for displaying the stored data.
5. User class - an abstract class
a) This class should have fields to store user entered values such as name, gender, age group, and height.
This class should have:
b) Constructor, accessor and mutator methods.
c) A toString() method for displaying the User details.
6. UserEnergyNeeds class
a) This class extends the User class. This class should have a member fields to store expected average weight, bmr corresponding to the user's age group, gender and height, and the PALdata to store chosen PAL and corresponding energy requirement. The height entered should be between 1.5 and 2m inclusive. Use validation and exception handling to handle this error.
7. GUI Components class
a) This class should have the GUI components listed above.
b) It should have the methods to set up the GUI components and the event handling methods.
c) This class should have method to read data from the file and load data structures appropriately.
d) This also contains main method.
5. Software Tools for Building the Application
You can build your application using the TextPad Editor or NetBeans. It is highly recommended that you create the GUI components using code rather than 'designer' and 'click and drag' of the NetBeans. This creates code which is not maintainable. Remember this is a good prototyping tool, but not recommended for coding.
Note: Commence with one class at a time, test it and then incrementally add the next.
Attachment:- DataAndSourceFiles.rar