TWO WAY COMMUNICATION USING TCP

Step 1 : Open 2 editors and write the coding separately for client and server.

Step2 : Include the  necessary   packages.

Step  3 : Create a new server socket in server side and storing the inputstream  in the buffered    

                   Reader.

Server Socket  ss = new  Server Socket(98);

Socket  s=  ss. Accept ();

BufferedReader  d = new BufferedReader(new  InputStreamReader (SyStepm.in));

Step  4 :  Print  the output stream  by using   print  writer.

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

Step 5 : Read the input and print the string  from the client until the string gets exit.

While(!(inp.equals(“exit”)))

{

String l= sin.readLine();

Out.println(l);

String inp=d.readLine();

}

Step 6 : Create a new socket in the client side.

Socket c= new Socket(InetAddress.getLocalhost(),98);

Step 7 : Print the outputstream and stored in buffered reader.

PrintWriter out=new Printwriter(c.getoutpustream(),true);

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

Step 8 : Save the program separately with the   java extensions.

Step 9 : Compile and execute the program.

 PROGRAM

SERVER

import java.io.*;

import java.net.*;

import java.lang.*;

class tcpc1

{

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

{

try

{

Socket ctsoc=new Socket("localhost",8000);

while(true)

{

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

String str1=in.readLine();

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

if(str1.equals("exit"))

{

ctsoc.close();

}

else

SyStepm.out.println("Client");

BufferedReader stdin=new BufferedReader(new InputStreamReader(SyStepm.in));

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

String userinput=stdin.readLine();

out.println(userinput);

if(userinput.equals("exit"))

{

ctsoc.close();

}}}

catch(IOException se)

{

SyStepm.out.println("server disconnected...");

}}}

CLIENT

import java.io.*;

import java.net.*;

import java.lang.*;

class tcps1

{

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

{

ServerSocket srsoc=new ServerSocket(8000);

Socket clientsoc=srsoc.accept();

while(true)

{

try{

SyStepm.out.println("Start:");

String ipln;

BufferedReader stdin=new BufferedReader(new InputStreamReader(SyStepm.in));

ipln=stdin.readLine();

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

out.println(ipln);

if(ipln.equals("exit"))

{

clientsoc.close();

srsoc.close();

break;

}

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

String str1=in.readLine();

if(str1.equals("exit"))

{

SyStepm.out.println("Client disconnected...");

clientsoc=srsoc.accept();

}else

{

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

}}catch(IOException se)

{

SyStepm.out.println("Client not found...");

clientsoc=srsoc.accept();        

}}}}

OUTPUT

Server

C:\Users\User>cd C:\j2sdk1.4.2_08\bin

C:\j2sdk1.4.2_08\bin>javac tcps1.java

C:\j2sdk1.4.2_08\bin>java tcps1

Start:welcome to india

Client:thank you

Start:hello how are you

Client:fine thanks

Start:

Client

C:\Users\User>cd C:\j2sdk1.4.2_08\bin

C:\j2sdk1.4.2_08\bin>javac tcpc1.java

C:\j2sdk1.4.2_08\bin>java tcpc1

Server: welcome to india

Client: thank you

Server: hello how is you

Client: fine thanks