Client to Server Messaging

This example demonstrates the messaging from client to the server.

Client Side Implmentation

import java.net.*;
import java.io.*;

class Arjun {
    public static void main(String[] args) throws IOException{
        /* Let's use port 6666 for example. */
        Socket s = new Socket("192.168.0.122",6666);

        DataOutputStream dout = new DataOutputStream(s.getOutputStream());

        // Writes the message in UTF Format.
        dout.writeUTF("Hello, my Name is Arjun. Can I know information about my attendance status ?");
        dout.flush();
        dout.close();
        s.close();
    }
}

Server Side Implementation

import java.io.*;
import java.net.*;

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

        // Step 1: First, server should instatiate ServerSocket object.
        ServerSocket ss = new ServerSocket(6666);

        // Step 2 : Then, Server object envokes accept() method of ServerSocket class.
        // This waits for client until client creates Socket object.
        Socket s = ss.accept();

        // This gets the message sent by the client.
        DataInputStream dis = new DataInputStream(s.getInputStream());

        // Typehinting the UTF message into string.
        String message = (String) dis.readUTF();

        System.out.println("Message from client : " + message);
        ss.close();
    }
}