Simply program in java and let the code interact with the Qlik Engine API:
Qlik Engine API
The Qlik Engine API is a WebSocket protocol that uses JSON to pass information between the Qlik Sense engine and the clients.
It can be used for:
- Building a client outside a web browser (for example, in Dotnet or Java)
- Extending the functionality of a web browser
The Qlik Engine API works on any platforms and with any programming language that include a WebSocket library.