Chat Server Socket

Following two socket programs demonstrate basic Chat application. You need to add additional functionalities and exception handling according to your needs.

Chat Server Socket Program

import java.io.*;

import java.net.*;

public class ChatServer {

    public static void main(String[] args) throws IOException {

        ServerSocket ss = new ServerSocket(1234);

        Socket cs = null;

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

        System.out.println("Waiting for connection.....");

        cs = ss.accept();      

        BufferedReader in = new BufferedReader(new InputStreamReader(cs.getInputStream()));

        PrintWriter out = new PrintWriter(cs.getOutputStream(), true);

        String inputLine, serverInput;

        while(true){

            inputLine = in.readLine();

            System.out.println("Client: " + inputLine);

            System.out.print("Server:");

            serverInput = br.readLine();

            out.println(serverInput);

        }

        out.close();

        in.close();

        cs.close();

        ss.close();

    }

}

//You may add exit condition in while loop of server socket.

Output on server screen:

Waiting for connection.....

Client: hello

Server:hello client

Client: how are you?

Server:I am fine...what about you?

Chat Client Socket Program

import java.io.*;

import java.net.*;

public class ChatClient {

    public static void main(String[] args) throws IOException

   {

         Socket s1 = new Socket("localhost", 1234);

         DataInputStream is = new DataInputStream(s1.getInputStream());

        // String request = "Hello";

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

         PrintWriter out = new PrintWriter(s1.getOutputStream(),true);

         System.out.print("Client:");

         String request = br.readLine();

         while(!(request.contentEquals("bye"))){

            out.println(request);

            String reply = is.readLine();

            System.out.println("Server:" + reply);

            System.out.print("Client:");

            request = br.readLine();

         }

         out.close();                   

         is.close();

         s1.close();

   }

}

Output on Client Screen:

Client:hello

Server:hello client

Client:how are you?

Server:I am fine...what about you?

Client:bye