Socket Programming in java

                                    Creating Chat Server in Java 

1. Open two notepad files.

2. Write the codes of Server and Client in separate files.

a.) Server Code

import java.io.*;

import java.net.*;

public class MyServerCode

{DataInputStream dIS;

public MyServerCode()

{

try

{

System.out.println("Server has Started\n Waiting for Client Connection Request...");

ServerSocket ss=new ServerSocket(1234);

Socket s=ss.accept();//Waiting for client connection

System.out.println("CLIENT has  Connected");

dIS=new DataInputStream(s.getInputStream());

serverChat();

}

catch(IOException ioe)

{

System.out.println(ioe);

}

catch(Exception e)

{

System.out.println(e);

}

}

public void serverChat() throws IOException

{

String str;

do

{

str=dIS.readUTF();

System.out.println("CLIENT Message ::"+str);

}

while(!str.equals("stop"));

}

public static void main(String args[])

{

new MyServerCode();

}

}

b.) Client-Side Coding

import java.net.*;

import java.io.*;

public class MyClientCode

{DataOutputStream dOut;

public MyClientCode()

{

try

{

Socket s=new Socket("localhost",1234);

dOut= new DataOutputStream(s.getOutputStream());

System.out.println("Enter the data to send to the SERVER");

clientChat();

}

catch(IOException ioe)

{

System.out.println(ioe);

}

catch(Exception e)

{

System.out.println(e);

}

}

public void clientChat() throws IOException

{

BufferedReader br= new BufferedReader(new InputStreamReader(System.in));

String st;

do

{

st=br.readLine();

dOut.writeUTF(st);

dOut.flush();

}

while(!st.equals("stop"));

}

public static void main(String args[])

{

new MyClientCode();

}

}

3. Now Compile the codes on different Command Prompts.

a.) Firstly compile the Server Code like this:

Now server is waiting for a client to connect.

b.) Compile and run client-side code.

Enter the message you want to send to the server 

Now the server will read the message will print it.