Looks like that's about 45 MB [1]. For comparison, Electron is about 80 MB. Qt starts at 50 MB depending on what you need, but a few years ago I got it down to 16 MB with UPX and a customized ICU. Gtk starts at ~20 MB and compresses to about half that with UPX. You could probably get those a bit smaller if your license permits static linking, but then you have to write C++.

[1] https://steveperkins.com/using-java-9-modularization-to-ship...