public static void downloadFile(String fileUrl)
        throws IOException {

        String fileName = fileUrl.substring(fileUrl.lastIndexOf("/")+1);

        URL url = new URL(fileUrl);
        InputStream is = url.openStream();
        FileOutputStream fos = new FileOutputStream("/Users/user/Desktop/" + fileName);
        int test = getFileSize(url);
        System.out.println(test);

        byte[] buffer = new byte[4096];
        int bytesRead = 0;

        System.out.print("Downloading " + fileName);
        while ((bytesRead = is.read(buffer)) != -1) {
            fos.write(buffer, 0, bytesRead);
        }
        System.out.print("done!");
        fos.close();
        is.close();

    }

    public static int getFileSize(URL url) {
        HttpURLConnection conn = null;
        try {
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("HEAD");
            conn.getInputStream();
            return conn.getContentLength();
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            conn.disconnect();
        }
    }