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Connecting to a Server
- Connecting to a server is extremely easy with
Java's built in socket classes for communicating via HTTP. You will
recall from day two how we connected to a web server using the GET
and POST methods of HTTP. Well in java, the process is exactly the same
Specifically, you create a socket object which connects to a server
somewhere on the web using syntax such as the following:
Socket s = new Socket("url", portNumber);
- Thus, the following code would open a socket
to www.extropia.com on port 80:
Socket s = new Socket("www.extropia.com", 80);
- So what happens if your application cannot reach
the server specified? Well, it is essential that you place your
networking within a try block which catches several errors such as
UnknownHostException, MalformedURLException, and IOException.
Additional Resources:
Network Programming in Java
Table of Contents
Getting Information from a Remote Site
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