Java How to Program, Early Objects, 11th Edition

28.4 Establishing a Simple Client Using Stream Sockets

Establishing a simple client in Java requires four steps.

Step 1: Create a Socket to Connect to the sServer

In Step 1, we create a Socket to connect to the server. The Socket constructor establishes the connection. For example, the statement

Socket connection = new Socket(serverAddress, port);

uses the Socket constructor with two arguments—the server’s address (serverAddress) and the port number. If the connection attempt is successful, this statement returns a Socket. A connection attempt that fails throws an instance of a subclass of IOException, so many programs simply catch IOException. An UnknownHostException occurs specifically when the system is unable to resolve the server ...