讲解 PROG2004、辅导 Java设计编程
Assessment Brief
PROG2004
Object Oriented Programming
Summary
Title Assessment 2
Deadline 9 June 2024
Type Programming
Academic Integrity Contract cheating and the use of GenAI, such as ChatGPT, in this assignment are strictly prohibited. Any breach may
have severe consequences.
Submission Code + Video using a USB drive
Unit Learning Outcomes This assessment task maps to the following ULOs:
• ULO2: apply object-oriented programming principles to solve intermediate problems
• ULO3: distinguish between and use advanced collection classes
• ULO4: apply various inbuilt mechanisms within the programming languages to handle concurrency and various
forms of input and output 2
Assessment Brief
Rationale
The purpose of this assessment is to test your ability to:
• Apply object-oriented programming principles to solve intermediate problems
• Distinguish between and use advanced collection classes
• Apply various inbuilt mechanisms within the programming languages to handle concurrency and various forms of input and output
Your work will demonstrate your learning over the first two modules of this unit.
Task Description
In this assignment, you will write the code that could form part of a management system for a gym.
To get started:
• Create a new Java project called username-A2 in IntelliJ.
• In the src directory, create five classes called: 3
Assessment Brief
o Person
o Staff
o Member
o GymClass
o AssessmentTwo
In the system you are creating:
• The Staff class is used to track the gym staff, e.g., trainers, reception, etc.
• The Member class is used to track the gym members.
• The GymClass class is used to track the classes offered at the gym, e.g., aerobics, yoga, CrossFit, etc.
In the Person class:
• Add at least 3 instance variables suitable for a person
• Add a default constructor and a second constructor that sets the instance variables using parameters
• Add getters and setters for all Person instance variables
In the Staff class:
• Extend the Person class
• Add at least 2 instance variables suitable for gym staff
• Add a default constructor and a second constructor that sets the instance variables (Staff and Person) using parameters
• Add getters and setters for all Staff instance variables
In the Member class:
• Extend the Person class
• Add at least 2 instance variables suitable for a gym member
• Add a default constructor and a second constructor that sets the instance variables (Member and Person) using parameters
• Add getters and setters for all Member instance variables 4
Assessment Brief
In the GymClass class:
• Add at least 3 instance variables suitable for a GymClass. One of these instance variables must be of type Staff, i.e. used to track the trainer running
the GymClass.
• Add a default constructor and a second constructor that sets the instance variables using parameters.
• Add getters and setters for all GymClass instance variables.
In the AssessmentTwo class add the following code:
public class AssessmentTwo {
public static void main(String[] args) {
}
public void partOne(){
}
public void partTwo(){
}
public void partThree(){
}
public void partFour(){
}
public void partFive(){
}
public void partSix(){
}
}
Module 3 - Advanced Collections
The following part of the assessment covers the content in Module 3.
Part 1 – Lists
The GymClass class is missing the ability to store a collection of Members who have signed up for the GymClass. For this part of the assignment:
• Using a LinkedList, update GymClass so that a GymClass object can store a collection of Members (i.e. datatype Member) who have signed up for the
GymClass. 5
Assessment Brief
In addition to adding a LinkedList, you need to add the following methods to GymClass that work with the LinkedList:
• A method to add a Member to the GymClass.
• A method to check if a Member is in the GymClass.
• A method to remove a Member from the GymClass.
• A method that returns the number of Members in the GymClass.
• A method that prints the details of all Members signed up for the GymClass (you must use an Iterator or you will get no marks).
Note: Make sure all the above methods print suitable success/failure messages.
Demonstration
In the partOne method in the AssessmentTwo class:
• Create a new GymClass object.
• Using the methods you created:
o Add a minimum of 5 Members to the LinkedList.
o Check if a Member is in the LinkedList.
o Remove a Member from the LinkedList.
o Print the number of Members in the LinkedList.
o Print all Members in the LinkedList.
Part 2 – Collection Class
There is no way to sort the Members who have signed up for a GymClass. For this part of the assignment:
• Create a class (you can choose the name) that implements the Comparator interface. When you implement the compare method from the Comparator
interface, you must use a minimum of two of the instance variables in your comparison.
• Create a method in the GymClass class that sorts the LinkedList using the sort(List list, Comparator c) method in the Collections class.
Note: You MUST use the Comparator interface. You CAN NOT use the Comparable interface. 6
Assessment Brief
Demonstration
In the partTwo method in the AssessmentTwo class:
• Create a new GymClass object.
• Using the methods you created:
o Add a minimum of 5 Members to the LinkedList.
o Print all Members in the LinkedList.
o Sort the LinkedList
o Print all Members in the LinkedList again to show that the LinkedList has been sorted.
Part 3 – Queue Interface
As most gym classes would have a maximum number of members that can sign up, the program needs the ability to keep track of Members who are waiting
to join the gym class and the order in which they joined the waiting list, i.e., first in first out.
For this part of the assignment:
• Using a Queue, update the GymClass class so that a GymClass can store Members (i.e., Member objects) who are waiting to join the GymClass.
In addition to adding a Queue, you need to add the following methods to the GymClass class that work with the Queue:
• A method to add a Member to the Queue.
• A method to remove a Member from the Queue.
• A method that prints all the details for all Members in the Queue in the order they were added.
Note: Make sure all the above methods print suitable success/failure messages.
Demonstration
In the partThree method in the AssessmentTwo class:
• Create a new GymClass object.
• Using the methods you created:
o Add a minimum of 5 Members to the Queue. 7
Assessment Brief
o Remove a Member from the Queue.
o Print all Members in the Queue.
Module 4 – Advanced exception handling
The following part of the assessment covers the content in Module 4.
Part 4 – Implementing exception handling
At the moment, you have not implemented any exception handling in your program. For this part of the assignment:
• Where applicable, make sure that all setters in your program confirm that the values they are writing to your instance variables are valid. If they are
not, throw an IllegalArgumentException and print an appropriate error message.
• Add any other exception handling that you feel is appropriate to your program.
Demonstration
In the partFour method in the AssessmentTwo class:
• Using one of the setters that you added exception handling to:
o Pass a valid value to the method and show that the instance variable is set
o Pass an invalid value to the method and show that the exception is caught
Module 5 – Input/output
The following part of the assessment covers the content in Module 5.
An important part of many programs is the ability to back up data to a file and then restore it as needed. In this section of the assignment, we will add this
ability to our program.
Hint for exporting and importing data
A common way to store data in a file that needs to be imported later is to use comma-separated values (csv). This means that we store a record on a single
line, and we separate values using a comma (,). For example, imagine an object for a class called Animal has the following information: 8
Assessment Brief
• species: Dog
• breed: Poodle
• colour: Brown
• name: Fido
• age: 7
You could store the Animal object in the file on a single line like:
Dog, Poodle, brown, Fido, 7
When you read the file, each line in the file will contain the details for a single Animal object. You can then use the split() method from the String class to split
the line into the individual values and then use the values to create a new Animal object.
Part 5 – Writing to a file
The GymClass class is missing the ability to back up the Members who have signed up for the GymClass. For this part of the assignment:
• Add a method to the GymClass class that writes the details of all of the Members that have signed up for the GymClass (i.e. stored in the LinkedList)
to a file. The details for each Member should be written on their own line.
• You must make sure to add all appropriate exception handling and error messages.
Demonstration
In the partFive method in the AssessmentTwo class:
• Create a new GymClass.
• Add a minimum of 5 Members to the GymClass (i.e., the LinkedList).
• Export the Members to a file.
Part 6 – Reading from a file
The GymClass class is also missing the ability to restore the members who have signed up for the GymClass. For this part of the assignment:
• Add a method to the GymClass class that can read the file that was created in the previous section. 9
Assessment Brief
• When reading the file, you need to sign up all members for the GymClass (i.e., add them to the LinkedList).
You must make sure to add all appropriate exception handling and error messages.
Note: If you cannot enrol the Members in the GymClass (i.e., add them to the LinkedList), you will still get marks for reading the file.
Demonstration
In the partSix method in the AssessmentTwo class:
• Create a new GymClass.
• Import the file you created in the previous part of the assignment.
• Print the number of Members in the LinkedList to confirm that the correct number of Members were imported.
• Print all Members in the LinkedList to confirm that the details of each Member were imported correctly.
Module 6 – Concurrency
The following part of the assessment covers the content in Module 6.
Part 7 – lock() and unlock() methods
You are using a LinkedList to store the Members signed up for a GymClass. However, a LinkedList is not thread-safe. This means that if multiple threads were
performing operations on the Members signed up for a GymClass you could encounter issues. For this part of the assignment:
• Use the lock() and unlock() methods to protect any critical sections of code in the GymClass class that perform any operations on the LinkedList that
stores the Members signed up for a GymClass.
• You must make sure to add all appropriate exception handling and error messages.
10
Assessment Brief
Resources
To complete the task, you are recommended to:
• Study modules 1 - 6 materials and complete all learning activities
• Take an active role in the weekly tutorial and workshop.
Task Submission
You are required to submit three items for this assessment, including:
• Your Java project
• A short video as outlined below
These items are outlined below:
Java Project
Zip your project into a file called username_A2.zip. Please note that the extension of the file must be zip. Any other compression, e.g. .rar will NOT be
accepted. 11
Assessment Brief
Video
Create a short video with a minimum one-minute explanation for each part of your assessment. In the explanation, you must:
• Explain why you wrote your code the way you did
• Run your code
• Demonstrate that you understand the code you are submitting and did not use ChatGPT or similar to generate it, or copied from somewhere else.
For each part of the assessment, if you cannot demonstrate that you understand your code you will not get marks for that part.
Assessment Criteria
Please refer to the rubric provided in the assessment folder for the assessment criteria. Marking criteria include:
• Java code compiles with Java 17 LTS
• Use of correct coding style, including the use of comments
• Accuracy of coding
• Use of suitable coding structures
• Correct submission and naming conventions of assessment items as required 12
Assessment Brief
Use of Gen AI such as ChatGPT
Generative artificial intelligence (GenAI) tools, such as ChatGPT, must not be used for this assessment task. You are required to demonstrate that you have
developed the unit's skills and knowledge without the support of GenAI. If you use GenAI tools in your assessment task, it may result in an academic integrity
breach against you, as described in the Student Academic and Non-Academic Misconduct Rules, Section 3.
Please note that your assignment will be submitted to a similarity detection service by your marker. Advanced plagiarism detection software will be used that
compares the answers for all students to all questions and flags any similarities in assessments. If your marker has any suspicion that you had help with your
code or that your work is not your own, you will be asked to come to a meeting with your marker to explain your code. Any student who is unable to explain
their code will be submitted for academic misconduct.