CHC6186 Advanced Object-Oriented Programming Coursework
For this coursework, you will produce in Java two versions of the game Wordle. One version will have a Graphical User Interface (GUI) and the other version will have a command-line interface (CLI). The GUI version will be constructed according to the principles of Model View Controller, and the CLI version will use the same model. The two versions will from now on be called the GUI version and the CLI version.
Learning Outcomes
This coursework will assess the following learning outcomes.
¡ñ Create a software artefact by applying the methodologies of advanced object-oriented programming to a requirements specification
¡ñ Consult on-line code libraries to find the classes and methods most appropriate for solving a problem
¡ñ Create appropriate documentation that clearly communicates the intended behaviour of a program
This coursework is worth 50% of your module mark; the remaining 50% comes from your exam.
How to Play Wordle
Wordleisarecentlypopularwordguessinggameavailableonline. 1
The player must guess a five-letter word in six tries or less. Once the word is typed in (and enter pressed), the background colour of each letter tile is changed to either dark grey indicating that the letter is not found in the desired word, gold indicating the letter is found in the word but not in the position indicated and green indicating that the letter is found at that position; a letter can occur more than once in a word. The word entered must be a valid English word. Once the word has been guessed the game will stop. The game will also stop once the player has made six tries.
The website is implemented in Javascript. Any attempt to submit Javascript will receive a mark of zero and any Java based on the website¡¯s Javascript will be treated as plagiarism in the normal way. The website colours may be used.
1 https://wordlegame.org/
Functional Requirements
For greater clarity, the description of the GUI and the CLI versions of the game can be summarised in the following list of functional requirements.
FR1 For the GUI version, there is no need to display a confirmatory message explaining that the player has won (guessed the word) or lost (run out of guesses) since the game status is clear from the tile colouring on the last filled row.
FR2 For the CLI version, a confirmatory message indicating the player has won or lost is required.
The behaviour of the program shall be controlled by three flags. One flag should, if set, cause an error message to be displayed if the word is not in the list of known words; this will not then count as one of the tries. Another flag should, if set, display the word to be guessed for testing purposes. Another flag, should, if set, cause the word to be randomly selected. If unset, the word will be fixed.
The GUI version of the program should respond to key presses for each letter of the alphabet, backspace (to remove the last typed letter on a non-empty line) and enter (to indicate that the word on the current line is the user’s guess). This can be done with a text field or otherwise.
The Model should load in a list of five-letter words from which the target word can be selected and a larger list of five-letter words that are not target words but are valid guesses. The lists should be two separate files loaded from a fixed location and are given to you; in other words, it is not necessary to ask the user where the files are stored.
The GUI should display a keyboard in which letters are displayed in dark grey if it has been revealed that they do not occur in the word, green if a correct location of a letter has been found and gold if the letter has been guessed but never at the correct location. See below for an example; this functionality is like the GUI shown on the website. The CLI should indicate available letters by listing the letters in the four separate categories alphabetically.
FR7 The GUI version should have a button to ask for a new game which will be enabled only after the first valid guess has been made. This is not required for the CLI version.
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Non-functional Requirements
The following non-functional requirements also apply
NFR1 The GUI version and CLI version should be two separate programs ie there should be two files each with a main method in them and which file is run determines which version activated.
NFR3 The CLI version will use the Model part of the GUI version directly without using the View or Controller; nor should it define a new view or controller.
NFR4 The code must be documented with asserts, unit testing, class diagram, comments as described below.
NFR5 The code must be of good quality as described in the marking scheme below.
NFR6 The flags mentioned in FR3 should be in the Model. It is not necessary for them to be
changeable at run time.
NFR7 The model should also have a constant indicating the number of allowable guesses.
Marking Scheme (See rubric as well).
The GUI version must be constructed according to the principles of MVC, as restated below. Because of this requirement, code that belongs in the View but is placed in the Model will usually not be counted towards the marks for the View. Similar rules will apply for other misplaced code.
Model. This should have an interface designed to be convenient for the Controller, View and JUnit class to use with no superfluous public methods, no references to two classes and contain no GUI code. It may consist of several classes but there must be a class called Model or similar that provides the interface and this class should extend Observable. File reading should also be done in the Model. A high mark will be earned for a Model that implements all the required functionality and respects all these constraints. A pass mark will be earned for a Model that implements only some of the required functionality or fails to respect these constraints.
Controller. This should forward only valid requests to the Model, querying the Model if necessary to find out if the request is valid, and must also enable / disable buttons as described above in the functional requirements. It must have no GUI code, though it may send messages to the View. A high mark will be given to a controller that respects all these constraints and a pass mark will be given to a controller that respects only some of them
View of GUI version using the Swing framework. It should implement Observer and therefore have an update method that is called when the Model changes. This will be marked according to how many of the functional requirements have been met. A high mark will be given to a view that implements all the requirements and a pass mark will be given to a view that implements only some of them.
CLI version of the program, using the Model. 10%
Specification of Model with asserts. This should include invariants for the class as well as pre and post conditions for each public method in the model. This will be marked according to how many of the relevant conditions are included and whether the ones that are included are correct. Partial credit will be available for describing them in English. A high mark will be given to a specification that includes all the relevant constraints. A pass mark will be given to a specification that includes only a few of them.
Unit testing of the Model in JUnit. There should be three tests, significantly different from each other. You should explain in comments the scenario ie the situation you are testing for. You should use write (and then call) methods for the Model that set it into the state desired for the test. It should be easy to see what state the Model is being set to by reading the code for the unit tests. A high mark will be given to significantly different tests
that are easy for the marker to interpret. A pass mark will be given to unoriginal second or third tests or to three tests that are difficult to understand. Your Model may use a separate Board class but the testing should be of the Model class and the specification should be applied to that class also.
Use of the code quality practices described in Lecture 1, plus the additional practices of light relevant commenting and correct formatting. Short elegant programs are preferred, and code smells are to be avoided. Note that high marks for this category will only be possible if the GUI fulfils most of the requirements. A high mark will be awarded if all the practices are observed and a pass mark will be awarded if only some of them are.
Class diagram. This should show how the Model, View and Controller are related to each other, as well as how they interact with library classes such as Observable. Simplicity and clarity will be reward. It will be marked according to its accuracy as a representation of the program. A high mark will be awarded for an accurate diagram and a pass mark will be awarded for a less accurate diagram.
Video presentation that shows you displaying the code and using the program. It will be 10% marked according to timing, presentation and how well you show that you have met the
FRs and NFRs in both versions.
Submission
Your submission should contain three files (.pdf, .zip and .mp4). The first file is a .pdf document with screenshots of the implementation (Java code), testing and design with a class diagram. The second file is a .zip file with the Java project. The third file is a .mp4 video that less than 1 GB. If the video is not viewable it will not receive marks. The video must be a maximum of three minutes long during which you must display most of the relevant functionality and refer to your code. Any recording software can be used so long as it captures your screen and your voice. The pdf document is the version that will be marked but the .zip and .mp4 is requested so that we may run the code.
You must save the files with the following names: {YourStudentNumber}-coursework.pdf {YourStudentNumber}-coursework.zip {YourStudentNumber}-coursework.mp4
For example: 202107081314-coursework.pdf, 202107081314-coursework.zip, 202107081314- coursework.mp4
You must upload from the student website (student.zy.cdut.edu.cn) before 17:00, May 22th (Monday).
Some students will be selected to give a Zoom presentation, after the exam period. If you are asked to give a Zoom presentation then you must do so.
Formative Feedback
We are giving you the opportunity to receive feedback on the design of your program. To receive this feedback, you need to upload a detailed UML class diagram of your code to student website before 17:00 on Friday March 31. As this is a formative feedback deadline, it will not be possible for you to seek deadline extensions. You will be given a short amount of written feedback on your design within a week. The Week 5 teaching session will go through a worked example in order to help you produce the class diagram.
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The class diagram should have all methods and attributes showing. In addition, you should indicate which methods call which other methods. A class diagram with insufficient detail or syntactically nonsensical or not realisable as an actual Java program will make it more difficult for us to give you feedback and will receive a low mark if submitted with the final report.
Academic Conduct
This is an individual piece of work and you will have to work on your own and submit your own original attempt at the assignment. Any code that has been copied from any source (e.g. Stack Overflow, online tutorial, textbooks, other students etc.) must be properly referenced to avoid any suspicion of plagiarism. Refer to the Module Handbook for further information on this. If you need help you can always ask for advice and guidance from the module leader by email; online sessions can be arranged for further clarification.
Rubric The work shall be marked according to the following rubric. DCBA
only basic functionality implemented or slightly more than basic but references to View or Controller or superfluous methods
no superfluous methods and no references to View or Controller but only the basics of functionality implemented
no superfluous methods and no references to View or Controller but only the basics of functionality implemented
convenient to use with no superfluous methods, all required functionality and no references to View or Controller, extends Observable, calls setChanged and notifyObservers
Controller
zero of the requirements: only valid requests, querying Model first, enables/disables buttons without GUI code
one out of only valid requests, querying Model first, enables/disables buttons without GUI code
two out of only valid requests, querying Model first, enables/disables buttons without GUI code
only valid requests, has references to both Model and View, converting UI interactions into methods to change the Model, querying Model first, enables/disables buttons without GUI code
no view update method or update method implementing very few of the FRs
update method in view implementing some of the FRs
update method in view implementing most of the FRs
update method in view implementing all the FRs, uses Swing, has Model and Controller as attributes, displays board and allows Controller to change the view e.g. enable/disable options, implements Observer and calls addObserver
CLI version implementing very few of the FRs
CLI version implementing some of the FRs
CLI version implementing most of the FRs
CLI version implementing all the FRs, using same Model as the GUI version, but no Controller and is demonstrated on the video
Specification of
Model with asserts
a few pre/postconditions described in English
suitable pre/post conditions for most public methods but in English
suitable pre/post conditions for most public
methods expressed in some logic
suitable pre/post conditions for all public methods and class invariants all expressed as statements of formal logic
Unit testing of
Model with JUnit
one test with the scenario poorly described or not at all
tests all essentially similar or only one or two or scenario being tested poorly described
third test not significantly different or scenario being tested not described with sufficient care
three significantly different tests of the model with all scenarios exactly described and with all inputs satisfying the preconditions
Code quality practices
most code quality practices not observed
some code quality practices observed but many not
most code quality practices observed but some clearly not
all code quality practices observed including light correct commenting, suitable identifier names (constants, methods, classes etc) in appropriate cases, indentation, lack of code smells (long methods, repeated code, lack of modularity)
Class diagram
Inadequate class diagram with serious mistakes in attributes and relationships between classes
Adequate class diagram with mistakes in both attributes and relationships between classes
Good class diagram with only a few mistakes in attributes, visibility or relationships between classes
Excellent class diagram with all attributes indicated with correct visibilities and correct relationships between classes all shown
Video Presentation
Very poor presentation with insufficient coverage of FRs and NFRs, poorly presented and overly long
Passable presentation covering FRs or NFRs or well-presented or at least appropriate length
Quite good presentation but missing some details of FRs and NFRs or poorly presented or overly long
Excellent presentation with full explanation of most FRs and NFRs, referencing the code, well presented and within time limit
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