import java.net.URL;
import java.net.URLConnection;
public class Main {
public static void main(String[] argv) throws Exception {
int size;
URL url = new URL("http://www.server.com");
URLConnection conn = url.openConnection();
size = conn.getContentLength();
if (size < 0)
System.out.println("Could not determine file size.");
else
System.out.println(size);
conn.getInputStream().close();
}
}