List of classes that you will write:

$$ServerStart $$contains the main method to instantiate and start up the Server.

$$Server $$the Server class code

$$ClientStart $-$contains the main method to instantiate and start up the Client.

$$Client $$the Client class code, including the GUI

$$ThreadOperation $$You won$$t write this one because you should already have

written it for the previous lab. If the previous lab went well then you will be able to use

this without any modification.

Instructions for Part $1($in three steps$)$

For part $1$you need to setup the GUI and write most of the client$-$side code.

A$.$Write the GUI with a textfield and implement the code so that the user can type into the

textfield and see the text they typed in printed on the command prompt.

B$.$The user is supposed to be typing in a file name such as matrix$1.$txt$.$Now modify

your code so that the text the user typed in is used as the filename that is opened. Open

the file and read in the data $($number of rows, number of columns, and the two integer

matrices$).$This code can be copy pasted $($with a few small modifications$)$from the

previous lab.

C$.$Pass the two matrices to the Server and write the server so that it displaysthe matrices

on its end $($either through a Server GUI or on the Server$-$side command prompt$).$

DO NOT perform any matrix calculations on the Server side yet. Don$$t create threads or sum

quadrants or calculate indexes. I want to make sure Part $1$is completed successfully before

you move on$.$

Instructions for Part $2$

Integrate the concurrent programming code from the previous lab into the server code,

perform the concurrent sum of the matrix quadrants, then transmit the solution matrix back to

the client. The client should then display the solution in a textarea.

Make sure that you also implement the TERMINATE command to close the connection. Make

sure that the Server continues running, waiting for future clients to connect.

That$$s it$.$No part $3.$

Compilation and Execution

I will test your program as follows:

$$javac $*.$java

for the Server

$$java ServerStart

for the Client

$$java ClientStart

USING $//$Ask user to enter the matrix file

$//***$not covered:

$//$ Perform the multi$-$thread computation and gather the result

$//$ Display the result on the JScrollPane

$//$Demo: Display the content of the matrix from the file opened by the previous step

import java.awt.BorderLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io$.$IOException;

import javax.swing.JEditorPane;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTextField;

import javax.swing.JTextArea;

import java.util.Scanner;

import java.io$.$File;

import java.io$.$FileNotFoundException;

public class ReadWriteData extends JFrame

$\{$

$$private JTextField enterField; $//$JTextField to enter the matrix file name

$$private JTextArea displayArea; $//$JTextAreato display the computation result

$$private File file;

$$private Scanner input;

$//$set up GUI

$$public ReadWriteData$()$

$\{$

$$ super$("$Open File and Output Data Example"$)$;

$//$create enterField and register its listener

$$ enterField $=$new JTextField$("$Enter file name here"$)$;

$$ add$($enterField$,$BorderLayout$.$NORTH$)$;

$$

$$ displayArea $=$new JTextArea$()$;

$$ add$($new JScrollPane$($displayArea$),$BorderLayout$.$CENTER$)$;

$$

$$ enterField.addActionListener$($

$$ new ActionListener$()\{$

$//$get the file name specified by user

$$ public void actionPerformed$($ActionEvent event$)\{$

$$ getFile$($event$.$getActionCommand$())$;

$\}$

$\}$

$)$;

$$ setSize$(400,300)$; $//$set size of window

$$ setVisible$($true$)$; $//$show window

$\}$

$//$load document

$$private void getFile$($String file$\_$name$)$

$\{$

$$ file $=$new File$($file$\_$name$)$;

$$ try $\{$

$$ input $=$new Scanner$($file$)$;

$\}$catch $($FileNotFoundException e$)\{$

$$ System.out.printf$("\%$nError on file: $\%$s $($either enpty or wrong file format$)\%$n$\%$n$",$file$)$;

$$ e$.$printStackTrace$()$;

$$ System.exit$(1)$;

$\}$

$$

$$ String s;

$$ while $($input$.$hasNextLine$())\{$

$$ s $=$input$.$nextLine$()$;

$$ displayArea.append$($s $+"$

$")$;

$\}$

$\}$

$\}$

AND

$//$Create and start a ReadWriteData object.

import javax.swing.JFrame;

public class ReadWriteDataTest

$\{$

$$public static void main$($String$[]$args$)$

$\{$

$$ ReadWriteData application $=$new ReadWriteData$()$;

$$ application.setDefaultCloseOperation$($JFrame$.$EXIT$\_$ON$\_$CLOSE$)$;

$\}$

$\}$