Implement Chat server and client using TCP Sockets

Implement Chat server and client using TCP Sockets

Chat Server:

import java.io.*;

import java.net.*;

public class Server

{

public static void main(String arg[])

{

ServerSocket srv=null;

DataInputStream fromClient;

PrintStream toClient;

BufferedReader out;

Socket clnt=null;

String str1,str2;

try

{

srv=new ServerSocket(9999);

}

catch(IOException e1)

{

System.out.println(e1);

}

try

{

clnt=srv.accept();

fromClient=new DataInputStream(clnt.getInputStream());

toClient=new PrintStream(clnt.getOutputStream());

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

toClient.println("Welcome");

while(true)

{

str1=fromClient.readLine();

if(str1.equals("exit"))

System.exit(0);

System.out.println("Client: "+str1);

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

str2=out.readLine();

toClient.println(str2);

}}

catch(IOException e2)

{

System.out.println(e2);

}}}

Chat Client:

import java.io.*;

import java.net.*;

public class Client

{ public static void main(String arg[])

{

Socket clnt=null;

DataInputStream fromServer;

PrintStream toServer;

BufferedReader out;

String str1,str2;

try

{

clnt=new Socket("SP-PC",9999);

}

catch(UnknownHostException e1)

{

System.out.println("Host Unknown");

}catch(IOException e2)

{

System.out.println("I/O Problem");

}

catch(Exception e1)

{}

try

{

System.out.println("server notrespond");

fromServer=new DataInputStream(clnt.getInputStream());

toServer=new PrintStream(clnt.getOutputStream());

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

while(true)

{

str1=fromServer.readLine();

System.out.println("Server: "+str1);

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

str2=out.readLine();

toServer.println(str2);

if(str2.equals("exit"))

System.exit(0);

} }

catch(Exception e3)

{

System.out.println("Server not respond");

} } }