Java app - on Win - detect updates - and download and install over internet

I'd like to develop some java apps that run on win desktops

One neat feature I'd like to implement is to have my apps auto-detect (selected in app settings) any program or data updates and then to have those updates auto-downloaded and installed, and then to have the apps restart if needed or do a full re-installation, whatever is appropriate.

How is this done?

Is this a feature of an installer like NullSoft or is this something that I'd have to code from scratch?

Many thanks :-)

You'll have to code it from scratch.

Okay, thanks 🙂