Write a program that enables two users to chat using JavaFX, threads, sockets. I

Question

Write a program that enables two users to chat using JavaFX, threads, sockets.
Implement one user as the server and the other as the client.
The server has two text areas: One for entering text and the other(non editable) for displaying text received from the client. When the user presses the enter key , the current line is send to the client.
The client too has two text areas: One for entering text and the other(non editable) for displaying text received from the server. When the user presses the enter key , the current line is send to the server. Server Server Client

Explanation / Answer

//Here is the coding portion of Client .java file
package Server_to_Client;
import java.io.*;
import java.net.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class Server_to_Client extends JFrame{
String s="";
/**
* @param args the command line arguments
*/
private JTextArea jtaServer = new JTextArea();

// Text area for displaying client text
private JTextArea jtaClient = new JTextArea();

private PrintWriter output,output1,output2;

public static void main(String[] args) {
new Server_to_Client();
}

public Server_to_Client() {

// Place text area on the frame
setLayout(new GridLayout(2, 1));
JScrollPane jScrollPane1 = new JScrollPane(jtaServer);
JScrollPane jScrollPane2 = new JScrollPane(jtaClient);
jScrollPane1.setBorder(new TitledBorder("Server"));
jScrollPane2.setBorder(new TitledBorder("Client"));
add(jScrollPane2, BorderLayout.CENTER);
add(jScrollPane1, BorderLayout.CENTER);

jtaServer.setWrapStyleWord(true);
jtaServer.setLineWrap(true);
jtaClient.setWrapStyleWord(true);
jtaClient.setLineWrap(true);
// jtaClient.setEditable(false);

setTitle("Client");
setSize(500, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null); // Center the frame
setVisible(true); // It is necessary to show the frame here!

try {
// Create a server socket
Socket connectToServer = new Socket("localhost", 8000);

output = new
PrintWriter(connectToServer.getOutputStream());
new SendThread(connectToServer).start();
new ReceiveThread(connectToServer).start();
}
catch(IOException ex) {
System.err.println(ex);
}

jtaServer.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == e.VK_BACK_SLASH) {
s=jtaServer.getText().toString();

}
}
});
}

class SendThread extends Thread {
SendThread(Socket socket) {
// Keep sending to the client
try {
output1 = new PrintWriter(socket.getOutputStream());
output1.write(s);
output1.flush();
}
catch(IOException ex) {
System.err.println(ex);
}
}
}

class ReceiveThread extends Thread {
ReceiveThread(Socket socket) {
// Keep receiving from the client
try {
Scanner input1 = new Scanner(socket.getInputStream());
String s1=input1.nextLine();
jtaServer.setText(s1);
}
catch(IOException ex) {
System.err.println(ex);
}
}
}
}

//////////////////////////////////////////////////////////////////////////////////////////////////

//Here is the coding portion of Server .java file

package Client_to_Server;
import java.io.*;
import java.net.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class Client_to_Server extends JFrame{
String s="";
/**
* @param args the command line arguments
*/
private JTextArea jtaServer = new JTextArea();

// Text area for displaying client text
private JTextArea jtaClient = new JTextArea();

private PrintWriter output,output1;

public static void main(String[] args) {
new Client_to_Server();
}

public Client_to_Server() {
// Place text area on the frame
setLayout(new GridLayout(2, 1));
JScrollPane jScrollPane1 = new JScrollPane(jtaServer);
JScrollPane jScrollPane2 = new JScrollPane(jtaClient);
jScrollPane1.setBorder(new TitledBorder("Server"));
jScrollPane2.setBorder(new TitledBorder("Client"));
add(jScrollPane1, BorderLayout.CENTER);
add(jScrollPane2, BorderLayout.CENTER);

jtaServer.setWrapStyleWord(true);
jtaServer.setLineWrap(true);
jtaClient.setWrapStyleWord(true);
jtaClient.setLineWrap(true);
// jtaClient.setEditable(false);

setTitle("Server");
setSize(500, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null); // Center the frame
setVisible(true); // It is necessary to show the frame here!

try {
// Create a server socket
ServerSocket serverSocket = new ServerSocket(8000);

// Listen for a new connection request
Socket connectToClient = serverSocket.accept();
output = new
PrintWriter(connectToClient.getOutputStream());
new SendThread(connectToClient).start();
new ReceiveThread(connectToClient).start();
}
catch(IOException ex) {
System.err.println(ex);
}

jtaServer.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == e.VK_ENTER) {
s=jtaServer.getText().toString();
System.out.print(s);
}
}
});
}

class SendThread extends Thread {
SendThread(Socket socket) {
// Keep sending to the client
try {
output1 = new PrintWriter(socket.getOutputStream());
output1.write(s);
output1.flush();

}
catch(IOException ex) {
System.err.println(ex);
}
}
}

class ReceiveThread extends Thread {
ReceiveThread(Socket socket) {
// Keep receiving from the client
try {
Scanner input1 = new Scannear(socket.getInputStream());
String s1=input1.nextLine();
jtaClient.setText(s1);
}
catch(IOException ex) {
System.err.println(ex);
}
}
}
}

-------------------------------------------------------

Please run these codings into your window and check out the output.

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