Java Network programming Question:

Another simple but useful application for a special-purpose HTTP server is redirection. In this section, we develop a server that redirects users from one web site to another--for example, from cnet.com to home.cnet.com. Example reads a URL and a port number from the command-line, opens a server socket on the port, then redirects all requests that it receives to the site indicated by the new URL, using a 302 FOUND code. Chances are this server is fast enough not to require multiple threads. Nonetheless, threads might be mildly advantageous, especially on a high-volume site on a slow network connection. And this server does a lot of string processing, one of Java's most notorious performance bottlenecks.