C/S architecture Java Quiz system with GUI

[GoldOne]

Structures of the Client/server Packages
The Java classes created in this assignment will have the following package structure. You may add more supporting classes in appropriate packages if necessary.
 Server packages:
/WorkingDirectory/Server
JavaQuizServer.java
questions.xml
(Other configuration files if any)
/au/edu/uow
/Networking
JavaClientHandler.java
(Classes related to networking)
/UserInterface
UserInterface.java
(Other interface related classes)
/QuestionLibrary
Question.java
MultipleChoiceQuestion.java
TrueAndFalseQuestion.java
(Other related classes to load questions)
Your main server application will be created in JavaQuizServer.java file, which will load the Java questions from the questions file and serve concurrent clients. The server should send different quizzes to different clients. The client handling task class is implemented in JavaClientHandler.java file.

Client packages:
/WorkingDirectory/Client
JavaQuizClient.java
(Other configuration files if any)
/au/edu/uow
/Networking
(Classes related to networking)
/ClientGUI
QuizClientGUIFrame.java
Student.java
(Other GUI related classes)
/QuestionLibrary
Question.class
MultipleChoiceQuestion.class
TrueAndFalseQuestion.class
Your main client application will be created in JavaQuizClient.java file, which will load your interface from QuizClientFrame.java. (Hint: develop your QuestionLibrary package in the server directory and copy only the compiled class files to the client directory.)

Client/server Communication Protocol:
The following methods are defined:
 REGISTER method:
Request: REGISTER username
The client sends the REGISTER message with a one word string username of the client user name to the server to register the user.
Response: OK
Upon receiving the REGISTER message, the server sends back an acknowledgement message, OK, to the requesting client.
 GET QUESTION method:
Request: GET QUESTION
The client sends the GET QUESTION message to the server to request a Java quiz question.
Response: (a question object)
Upon receiving the GET QUESTION message, the server sends back a serialised question object to the requesting client.
Do not send all details of a question in strings but send only an object of a multiple choice question or true-and-false question class to the client using object serialisation.
 BYE method:
Request: BYE
The client sends the BYE message to the server to end a session.
Response: (null)
Upon receiving the BYE message, the server closes the requesting client connection. The server does not need to send anything back to the requesting client.

Server Requirements
The server listens to a socket port for client connection requests. The server program can receive a command line argument for the listening port number. For example,
java JavaQuizServer 40213
If the server program starts without any argument, it listens to a default port.
The server should display information about the listening port and status of connected users in the console. For example:
JavaQuizServer listening at: 40213
Peter registered
Donna registered
Donna disconnected
Peter disconnected

Client GUI Requirements
The client program can receive a command line argument for the server name and/or port number. For example,
java JavaQuizClient localhost (or localhost:40213)
If the client program starts without any argument, it connects to local host and a default port.
 Before connection
After starting the client program, you should have the following interface. The status bar should show the current status of the program. Inapplicable items in a state should be disabled.

If the user closes the window at any time, you need make sure the client is disconnected from the server before the window closes. This can be done by setting the proper DefaultCloseOperation for the JFrame and processing the window event.
 After connection
After the client has connected to the server and registered, you should have the following interface displaying question details and allow the user to select an answer as shown in the figure Question Screen.
The status bar should always show the status of the program.
When the user selects an answer, the next question will be presented. The client should request 5 questions from the server.
When the last question is presented, the Next button should be changed to “Get Score” button.
Once the user pressed the “Get Score” button, The connection should be terminated and the final score should be presented as shown in the figure Final Score Screen.
The user name and scores should be maintained by the Student object in the client program.