Why this code do not download files

public class HttpDownloader {
 
    public static void main(String[] args) {
        String fileURL = "https://www.dropbox.com/s/vc0dbvag0lff47a/Paczka.zip?dl=1";
        String saveDir = "E:/Download";
        try {
            HttpDownloadUtility.downloadFile(fileURL, saveDir);
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

public class HttpDownloadUtility {
    private static final int BUFFER_SIZE = 4096;
 
    public static void downloadFile(String fileURL, String saveDir)
            throws IOException {
        URL url = new URL(fileURL);
        HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
        int responseCode = httpConn.getResponseCode();
 
        if (responseCode == HttpURLConnection.HTTP_OK) {
            String fileName = "";
            String disposition = httpConn.getHeaderField("Content-Disposition");
            String contentType = httpConn.getContentType();
            int contentLength = httpConn.getContentLength();
 
            if (disposition != null) {
                int index = disposition.indexOf("filename=");
                if (index > 0) {
                    fileName = disposition.substring(index + 10,
                            disposition.length() - 1);
                }
            } else {
                fileName = fileURL.substring(fileURL.lastIndexOf("/") + 1,
                        fileURL.length());
            }
 
            System.out.println("Content-Type = " + contentType);
            System.out.println("Content-Disposition = " + disposition);
            System.out.println("Content-Length = " + contentLength);
            System.out.println("fileName = " + fileName);
 
            InputStream inputStream = httpConn.getInputStream();
            String saveFilePath = saveDir + File.separator + fileName;
 
            FileOutputStream outputStream = new FileOutputStream(saveFilePath);
 
            int bytesRead = -1;
            byte[] buffer = new byte[BUFFER_SIZE];
            while ((bytesRead = inputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, bytesRead);
            }
 
            outputStream.close();
            inputStream.close();
 
            System.out.println("File downloaded");
        } else {
            System.out.println("No file to download. Server replied HTTP code: " + responseCode);
        }
        httpConn.disconnect();
    }
}

hey my question is why this Java code do not work with my direct dropbox link?

And how can i fix it or what should i do ? Because i dont have any idea why it do not work fine :/