Client server application program in java

The java. Socket class represents a Socket. The second argument — TCP Port. Just a number representing which application to run on a server. For example, HTTP runs on port Port number can be from 0 to Communication To communicate over a socket connection, streams are used to both input and output the data. Closing the connection The socket connection is closed explicitly once the message to the server is sent. In the computer world, both client and server are application programs.

A server program uses a server socket, whereas a client program uses a client socket for communication. The following Java programs illustrate how to establish communication between a client and a server. Explanation: We know that to establish a connection, sockets are required on the client and server-side.

The following statement creates a socket on the client-side:. The constructor of the Socket class takes two arguments: one is address IP address , and another is port port number and creates the object of the Socket class.

In the code, we have used port number Here, we have used localhost because the client application program and the server application program are running on the same system. Generally, a client program and a server program sit on different systems. In such a scenario, instead of localhost, the IP address of the system on which the server is running is used.

The port number means the client is trying to establish a connection to the server at port If the server is present at port , the connection gets established; otherwise, not. Whatever is written on the output stream is being read by the server. Here, str is a string that reads whatever the user gives as input. Sort: Best match Sort options. Star Updated Jan 6, Java. Updated Nov 9, Java. Star 7. Star 2. A Client-Server communication system written in Java. Updated Jun 2, Java.

Updated May 5, Java. Updated Sep 13, Java. Star 1. Updated Dec 26, Java. Updated Dec 25, Java. Multiprocessing and multithreading , both are used to achieve multitasking. Every modern operating system has the support for multi-threading—so does the application built to run on that operating system. No, doubt multi-threading programming increase the performance and concurrency in our application.

For certain applications, it is easier to code different procedures calls and conversation in a different thread than to manage them from the same thread. Mostly in a client-server application, you definitely want the create the server application in a multi-threaded environment where thousands of clients connected to one server. The application simply opens up a ServerSocket and after that, it accepts clients Smart Meter waiting for the connection.

There are thousands of smart meters trying to connect to that application. So, when the smart meter connects with the application via socket, the application creates its own separate thread for communication.

So, the first step was simple, I try to open up the ServerSocket holding the Pepsi can in my hand.