Famous Thread Application(Client-Server Program) in java

Application of Threads:

In a network, a server has to render its service to several clients at a time.So by using threads at server side programs,we can make the threads serve several clients at a time.

Program:

Server Side Program:

import java.io.IOException;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

/**
 *
 */

/**
 * @author Abhinaw.Tripathi
 *
 */

class MultiServe implements Runnable
{
static ServerSocket ss;
static Socket s;

@Override
public void run()
{
String name=Thread.currentThread().getName();
for(;;)
{
try
{
System.out.println("Thread Name:"+name + "ready to accept....");
s=ss.accept();
System.out.println("Thread Name:"+name + " accept a connection....");
PrintStream ps=new PrintStream(s.getOutputStream());
ps.println("Thread "+name + " contacted you");
ps.close();
s.close();
}
catch (IOException e)
{
e.printStackTrace();
}

}
}
}

public class MultiServerApp
{
public static void main(String[] args) throws Exception
{
MultiServe ms=new MultiServe();
ServerSocket ss = new ServerSocket(999);

Thread t1=new Thread(ms, "One");
Thread t2=new Thread(ms, "Two");

t1.start();
t2.start();

}

}

Client Side Program:

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.Socket;

/**

 * 

 */

/**

 * @author Abhinaw.Tripathi

 *

 */

public class MultiClient 

{

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

{

       Socket s=new Socket("localhost", 999);   

       BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));   

       boolean str;

       

       while(str=br.readLine() !=null)

      System.out.println(str);

       

       br.close();

       s.close();

}

}