URL FileUrl;
        try {
            FileUrl = new URL("http://www.jguru.com/images/logo.gif");
            URLConnection connection = FileUrl.openConnection();
            InputStream stream = connection.getInputStream();
            BufferedInputStream in = new BufferedInputStream(stream);
            FileOutputStream file = new FileOutputStream("caca.gif");
            BufferedOutputStream out = new BufferedOutputStream(file);
            int i;
            while ((i = in.read()) != -1) {
            out.write(i);
            }

out.close();

        } catch (IOException ex) {
            ex.printStackTrace();
        }