Laboratory work #5 | Network application Objectives This laboratory work intended for you to master basic principles of network interaction and serialization in the object-oriented solution. Instructions Having your solution of the Laboratory work #4, split your program into two programs. The first program implementing the server-side responsible for data carrying collection and operations to perform. The second program implementing the client side responsible for user interface – retrieving command from the user to ask the server for operations and get specific data items to display.
- Review the lecture about the network programming and serialization.
- Remember the last lab task from the first semester (Laboratory work #6 about Collections): there you had to create two classes for your applied domain scope – a data item class and a class carrying the collection of data items and responsible internal operations with data in it.
- Split your program into two (or create two separate projects as was demonstrated in the lecture #7) a. The server program listens for incoming connections and receives commands to perform with the collection of data items. Like what the Lab #6 was doing in the first semester but with networking instead of console.代写Network application Laboratory Use classes created during step 2 of Lab #4 for this step. b. The client program connects to the server program and shows the graphical UI. Like in the previous Lab #4 in this semester), retrieves the data items to display from the server side, when the user presses the command buttons, the program prepares all the required data and sends the command to the server for it to modify the collection and answer with the result data to display. Use classes create during steps 3 of Lab #4 for this step. c. Modify pieces created for step 4 of Lab #4 for send commands to the server side, retrieve the result and update the UI state.
- Use network protocol according to you variant number to implement the solution Extra tasks for additional points: Modify your server program so that it would be able to preserve data being operated between program launches by saving them on the server stopping and loading them when the server starts. No data should be preserved on the client side. Modify your data storage approach to use granular operations based on the last lecture about Advanced data organization.
Variants See variants table for data transfer approach and use your variant’s GUI layout and applied domain scope from the variant of Lab #4. Data transferring approach to use Number UI control 1 TCP protocol 2 UDP protocol 3 Java RMI
Extra information Brief overview of some IO classes to know about: ● Writer classes FileWriter OutputStreamWriter BufferedWriter StringWriter
● OutputStream classes DataOutputStream BufferedOutputStream ByteArrayOutputStream FileOutputStream PrintStream ● Reader classes FileReader InputStreamReader BufferedReader StringReader
● InputStream classes DataInputStream BufferedInputStream ByteArrayInputStream FileInputStream ● Parsing and formatting Scanner Formatter ByteBuffer ● File system management java.io.File WX：codinghelp
