JAVA CODE FOR TCP CHAT APPLICATION

PROGRAM: (SERVER)

import java.io.*;

import java.net.*;

class ChatS

{

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

{

ServerSocket s=new ServerSocket(3300);

Socket s1=s.accept();

for(;;)

{

DataInputStream d1=new DataInputStream(s1.getInputStream());

String s2=d1.readUTF();

System.out.println("client:"+s2);

DataInputStream b=new DataInputStream(System.in);

String s3=b.readLine();

DataOutputStream d3=new DataOutputStream(s1.getOutputStream());

System.out.print(“server: “);

d3.writeUTF(s3);

}  

}  

}

PROGRAM: (CLIENT)

import java.io.*;

import java.net.*;

class ChatC

{

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

{

Socket s1=new Socket("127.0.0.1",3300);

for(;;)

{

DataInputStream dis=new DataInputStream(System.in);

String str=dis.readLine();

DataOutputStream ds=new DataOutputStream(s1.getOutputStream());

System.out.print(“client: “);

ds.writeUTF(str);

DataInputStream d1=new DataInputStream(s1.getInputStream());

String Str1=d1.readLine();

System.out.println("server:"+Str1);    

}   

}  

}

OUTPUT: (CLIENT)

client: Hai

From server:How are you

client: fine

OUTPUT: (SERVER)

From client:Hai

server: How are you

From client: fine