18.04 – DPI Scaling for Java App on i3

I'm trying to run Xilinx Vivado on Ubuntu 18.04. Under the Ubuntu GNOME session, the application excels well on my HiDPI display (scale of 2). However, I want to run i3, and running Vivado within an i3 session does not cause DPI scaling.

I know of a possible workaround for Java apps, but I can not even find Jvm's call for this program (they launch it from a compiled binary file).

I know that something The GNOME session causes the correct character behavior, but I'm not sure where to look. I have to find the thing and duplicate it in my i3 session.