Implementing Servers in Java

***RazorDOX*** · 07-29-2010, 09:29 PM,

This is a small applications that can help you understand the activity of a web server. It uses Server Sockets. Here are some details of the methods used:
How to open a server:

Code:
ServerSocket server;

DataOutputStream os;

DataInputStream is;

server = new ServerSocket( PORT);

Waiting for the client's request:

Code:
Socket client = server.accept();

How to create I/O streams:

Code:
is = new DataInputStream(client.getInputStream() );

os = new DataOutputStream(client.getOutputStream() );

We will need 2 classes: DateClient and DateServer:
Here is the first class:

Code:
import java.net.*;

import java.io.*;

public class DateClient

{

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

        InputStream in = null;

        BufferedReader bin = null;

        Socket sock = null;

        try {

//Creating the socket client on the loop-back address (so we need to specify     

//the local machine )

            sock = new Socket("127.0.0.1",6013);

            //Binding the streams in input of the characters 

            in = sock.getInputStream();

            bin = new BufferedReader(new InputStreamReader(in));

            //Reading the input streams of the socket 

            String line;

            while( (line = bin.readLine()) != null)

                System.out.println(line);

        }

        catch (IOException ioe) {

                System.err.println(ioe);

        }

        finally {

           //we are closing the stream and the sockets 

           in.close();

           bin.close();

           sock.close();

        }

    }

}

This class works toghether with another one called DateServer:

Code:
import java.net.*;

import java.io.*;

public class DateServer

{

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

        Socket client = null;

        ServerSocket sock = null;

        try {

            //Creating the server socket to listen on a port

            sock = new ServerSocket(6013);

            System.out.println("DateServer listens to port: "+ sock.getLocalPort());

            //Listening

            while (true) {

                client = sock.accept();

                System.out.println("Connection accepted: "+ client);

                System.out.println("server = " + sock);

                System.out.println("client = " + client);

                   //The connection has been made

                PrintWriter pout = new PrintWriter(client.getOutputStream(), true);

                //We are writing the date of the socket

                pout.println(new java.util.Date().toString());

                //Closing the stream and the socket client (but not of the server socket!).

                pout.close();

                client.close();

            }

        }

        catch (IOException ioe) {

                System.err.println(ioe);

        }

        finally {

            if (sock != null)

                sock.close();

            if (client != null)

                client.close();

        }

    }

}

How to run this code:
First start java DateServer and then java DateClient
This code uses one single server. I can also teach you how to make it to work with multiple servers. Coming up next..

***promg*** · 07-29-2010, 09:53 PM,

Were do i find Java Dateserver and Java DateClient? O.o

this looks really interesting

***RazorDOX*** · 07-29-2010, 09:57 PM,

mgmaik Wrote:Were do i find Java Dateserver and Java DateClient? O.o

this looks really interesting

I already added the codes. All you need to do is copy and paste them in Java compiler.

***promg*** · 07-29-2010, 10:01 PM,

Razor Wrote:I already added the codes. All you need to do is copy and paste them in Java compiler.

I don't know nothing about java, Java compiler? is that an app? lol
were can i download that?

***promg*** · 07-29-2010, 10:35 PM,

I installed eclipse.. Smile

still dunno were to begin.. XD

***awaiz007*** · 07-30-2010, 03:00 AM,

Java is a high level and a good programming language which has many many advanced features

Thanks razor it takes some time for me to understand this u know why

***flashsc1*** · 07-30-2010, 03:06 PM,

Interesting class, I'm in!

**t3hp0wnz0rrr** · 12-26-2011, 07:33 PM,

If any of you need help with Java, i got 4 years of experience and am an advanced coder Wink