import java.net.*;
import java.io.*;
/**
  Class to download contents of URL.
*/
final public class GetFromInternet {
 private URL url = null;
 public GetFromInternet(URL url) {
   this.url = url;
 }
 public void to(OutputStream o) throws IOException {
   URLConnection conn = url.openConnection();
   conn.setRequestProperty("User-Agent","");
   InputStream in = conn.getInputStream();
   int b = -1;
   while ((b = in.read()) != -1)
     o.write(b);
   in.close();
 }
 public void to(String fname) throws FileNotFoundException,
IOException {
   to(new FileOutputStream(fname));
 }
 public static void main(String args[] ) throws IOException {
   new GetFromInternet(new URL(args[1])).to(new
FileOutputStream(args[0]));
 }
}

compile and then run something like:

java GetFromInternet it.html "http://www.google.com"

the example above will get google's splash source and put it into file
named "it.html"

Glancing at the code it looks right, I tried it, ... I do see a
problem... should the output stream be closed?  It should be before
main exits, but I did not do that.  Roedy's solution is more robust,
take a look at that one.  The code above has gist.

Opalinski
opalpa@gmail.com
http://www.geocities.com/opalpaweb/