代做program、Java设计编程代写

日期：2024-05-31 09:40

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.

1. Review the lecture about the network programming and serialization.

2. 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.

3. 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. 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.

4. 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

java.nio.file.Path

java.nio.file.Files