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Assignment 2 — OO Software Development COMP 155 : Object-Oriented Programming

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

i need help with java oop assignment

 

 

Assistant Professor

Computer Information Systems

University of the Fraser Valley

 

Assignment 2 — OO Software Development

COMP 155 : Object-Oriented Programming

(100 points)

 

Brief Description

This assignment amounts to 10% of the entire course grade. In particular, whatever your obtains as a

score will be scaled to this value for final grade computation. You are required to work ALONE. No

late submission will be permitted (see deadline above).

The goal of this assignment is to assess your knowledge and skills on Object-oriented concepts with

Java, while developing skills to map requirements (e.g. system model) to program code. You will find a

grading scheme at the end of this document – to guide you on instructor’s expectations while preparing

your submission.

Software Requirements

In this assignment, we will be commencing an implementation of COVID-19 monitoring and alert system.

In particular, we shall developing the building blocks for our desired system. The pandemic has hit hard

and affected the way we conduct our day-to-day businesses. Besides, the economy is bleeding and needs

urgent rescue strategies be deployed to ensure we return to normalcy.

This system will monitor COVID-19 in your neighborhood. It assumes there is a web service designated

as a source of information about all persons in Canada (including) their COVID status. Information

stored include: name, age, sex, address and a unique identifier (which could be a Social Insurance

Number - SIN). Allowed values for sex include: male, female or unknown (when a person prefers not to

specify).

An address is characterized with unit number, street number, street name, postal code, city, province

and type. Allowed values for address type are business, home, office. As everyone is at the risk of

contracting COVID-19, we allowed the following values for effective monitoring - positive, negative,

symptomatic (people with some COVID symptoms but are negative), asymptomatic (people that are

confirmed COVID positive but are not showing related symptoms), and unknown.

In addition, we introduce two shapes - rectangle and circle for the purpose of determining the proximity

of infection and effectively disseminate orders and warning messages. The dissemination of information

is based on an operational radius (which may be based on a policy). Whenever there is an infection, all

1

COMP 155: Assignment 2 — OO Software Development Opeyemi Adesina, PhD

the persons enclosed in the bounding rectangle of the operational radius are notified. Depending on the

cluster of infections, an alert about order or warning is issued by our system.

1. The model in figure 1 is a conceptual representation of a neighborhood. While red denotes people

with confirmed positive COVID cases. In our case, these are people whose status is either positive

or asymptomatic. Yellow is designated for people showing symptoms, while green designates people

who neither show symptoms nor COVID positive. Our goal is to develop the code corresponding

to these domain and implement the system in question.

Figure 1: Conceptual model of a neighborhood – showing infections

2. It figure 2, we present a domain model which represents the internal structure of system. It is

represented in a unified modelling notation with the goal of helping you understand the underlying

structure and to help you navigate the code. You are required to provide implementations

for the following:

13 points Location Class

• constructors

• accessor methods (getters and setters – for each instance variable)

• an overload of equal(. . .) method

• an overload of toString(. . .) method (see the output for acceptable format)

15 points Circle Class

• constructors

• accessor methods (getters and setters – for each instance variable)

• an overload of equal(. . .) method

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COMP 155: Assignment 2 — OO Software Development Opeyemi Adesina, PhD

Figure 2: COVID-19 Alert and Monitoring Domain Model

• an overload of toString(. . .) method (see the output for acceptable format)

• specialized implementations for the following:

– double perimeter(. . .) – 2πr

– double area(. . .) – πr2

– Rectangle boundingRectangle(. . .) – returns rectangle whose length = width = 2r.

15 points Rectangle Class

• constructors

• accessor methods (getters and setters – for each instance variable)

• an overload of equal(. . .) method

• an overload of toString(. . .) method (see the output for acceptable format)

• specialized implementations for the following:

– double perimeter(. . .) which is 2(l + b)

– double area(. . .) which is l ∗ b

– Rectangle boundingRectangle(. . .) – returns itself.

20 points Address Class

• constructors

• accessor methods (getters and setters – for each instance variable)

• an overload of equal(. . .) method

• an overload of toString(. . .) method (see the output for acceptable format)

27 points Person Class

• constructors

• accessor methods (getters and setters – for each instance variable)

• an overload of equal(. . .) method

• an overload of toString(. . .) method (see the output for acceptable format)

For implementation purposes you will find statements of the form: ”INSERT YOUR CODE”. Apart

from these places, do not modify any other part of the program unless you have consulted with the

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COMP 155: Assignment 2 — OO Software Development Opeyemi Adesina, PhD

instructor. I have included a test cases for each of the classes you are to create and their associated

methods in the QualityAssurance.java file. An example output for a run is given in figure 3. You

can as well obtain hint to implement the toString(. . .) from the output (of example run) in the stub

directory.

To compile and execute your code, please follow these chain of commands in the given sequence:

• javac -d . *.java (from the directory container the files - hard compile, compiling classes into their

respective packages)

• java Tracker (program execution from the same directory)

Figure 3: Expected Output

Grading Scheme

The following scheme will be used to grade your submission. Therefore, you may also use it as a guide

in preparing your deliverable.

Grade Item Weight

A syntactically and semantically correct program, passing all

the test cases included. You will be able to monitor your

progress using the test cases as a guide.

90

A program with detailed program documentation and uses sensible variable names. Your program’s file name and other

files should be zipped and named in the following format - [firstName lastName studentID]

10

Total 100

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