Lloseng

This repository contains a copy of the cody required to complete the first assignment using the book Object-Oriented Software Engineering: Practical Software Development using UML and Java, 2nd Edition, 2004 McGraw Hill. by Timothy C. Lethbridge and Robert Laganière.

Assignment 1 - 5% of the final grade (started during lab 2)

Assignment Submission before October 2nd, 11h59pm using BrightSpace

During the lab 2, you will start working on your assignment 1. The TA will explain how to setup your environment, how to measure the execution time of a Java program and HOW TO DEBUG!

INSTRUCTIONS

• Use the following invitation to join or create a repository for assignment 1. As we did for the lab 1 and project, one member of the team creates the repository, the other joins it.

https://classroom.github.com/g/DKiBYq0I

• You also need to create a Group in Brightspace (Groups_Assignment1).

Group work and partners: In this lab, and all other labs that involve programming, you will work in groups of two. You can work with students in ANY lab section (SEG2105B or SEG2105C). You can also work individually. No groups of 3 will be permitted.

Format

Your private repository should be named [prefix]-[student-number-1]_[student-number-2], for example

assignment1-1484511_90210901210

When finished, submit the following text via the Brightspace submission link:

• Your names and students numbers
• A link to your GitHub repository.

Your GitHub repository should contain all solutions to the Assignment 1, no solution submissions via BrightSpace will be evaluated.  Only the information above should be submitted to BrightSpace. Submissions by email will NOT be accepted.

Logistics

Using Eclipse

Eclipse will be presented in this lab. However, feel free to use your preferred IDE. Instruction on how to setup your environment will be presented during the beginning of lab 2. Material is available on BS (under lab 2).

Exercises

Work on the following exercises from the textbook. You must hand in only one copy of answers per group. Make sure the names and student numbers of both partners are clearly indicated. You must work on these questions during the lab and then finish off the work on your own time before the deadline.

Analysis of various design alternatives

1. Before coming to the lab, you are asked to read and understand Section 2.9 of the textbook, starting on page 57. If you have not done this, take five minutes now to do it. The texbook pages necessary to complete this assignment can be found in the Brightspace.

2. This Lab/Assignment will focus on PointCP from this repository, so all instructions will be relative to that directory.

cd pointcp

Before making any changes, compile the code and make sure it runs.

javac PointCP.java PointCPTest.java

To run the program

java PointCPTest

You can, of course, run the programs using the Eclipse IDE (or your preferred IDE).

PointCP

All modifications should be done within the /pointcp directory. By modifying the original version (Design 1), implement the following designs.

• design 2 (add code in /design2 directory). Add your code in PointCP2.java.
• design 3 (add code in /design3 directory). Add your code in PointCP3.java .
• design 5 (add code in /design5 directory). Add your code in PointCP5.java and modify your existing PointCP2.java and PointCP3.java (to adapt them to the new design requirements.

4. Modify the PointCPTest class to allow you to test the designs you have developed. Do a thorough series of tests to ensure your classes work properly. You can implement other classes to facilitate the task or add any extar functions to the PointCPTest class.

5. Hand in your answers to exercises E26 (table of what you think will be the advantages and disadvantages of each design), and E28-E30 (performance analysis, comparing all three designs you have implemented instead of Design 1 with Design 5 as the book says). To do this evaluation, for each design create random instances and then call each method many thousands of times, and then find the elapsed time in milliseconds for the fixed number of iterations. Make sure that your program runs each time for about 10 seconds so you get a good measure of performance. Test each method separately. Run each version several times to ensure that your results are consistent and use the median result as your definitive result, plus give the maximum and minimum execution time.

6. Hand in a description of how you did the tests, sample outputs from running the tests, the table and a discussion of the results.

Design	How cartesian coordinates are computed	How polar coordinates are computed
Design 2: Store polar coordinates only	Computed on demand, but not stored	Simply returned
Design 3: Store cartesian coordinates only	Simply returned	Computed on demand, but not stored
Design 5: Abstract class with designs 2 and 3 as subclasses	Depends on the concrete class used	Depends on the concrete class used

All your written answers can be submitted in a single Word or PDF document. Make sure to push this document into your repository.

PART 2 - Object Oriented Review

Based on the memory diagram below, write the implementation in Java of all the classes, instance variables, and constructors. Submit the Java classes including a class named Test.java containing a main method (that is used to create the necessary instances and initialize all variables). Place your code in the folder code_part2 of your repository.

If you have questions related to this assignment, please use the Piazza forums (tag assignment1)!