Getting the File size in java pgm

Getting the File size

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("The size of file is = "+size + "bytes");

      conn.getInputStream().close();

   }

}