Remarks
This implements a (slightly restricted) Web browser.
If you run this program it will print out the HTML source for the IT1 course Home Page.
It connects to port 80 on aspen (the Web server’s port).
It gets an output stream to write to the socket using getOuputStream().
It sends an HTTP “GET” request on the stream, specifying the file it1fall00/index.html relative to the server’s document root.
It gets an input stream to read from the socket using getInputStream().
It copies lines from the socket connection to the console.