How to create a global date entry shortcut/hotkey? Excel and Google Sheets both allow you to enter the current date (and time) with a single keystroke.  I would love to be able to do this in other applications too but can't find any way to do this without resorting to 3rd party apps that also do a whole lot more that I don't need.

Using Automator/Services won't work because the main application I want to use this with is a Java app called Tradewonk, and services appear to not be available to a java application (there is no "Services" option in the "Java" menu that appears when the app is running).

So any other suggestions for how I can generate the current date/time with a keystroke?  I'm on macOS Sierra.
Well I'll be damned... I had a solution the whole time.  I use BetterTouchTool for various gestures on my trackpad, but had forgotten that it could trigger text sequences as well, including current date/time.  Mapped them to shortcuts and voila, works great even in a Java app!  Admittedly it uses a 3rd party app but it's one I was already using (and woefully underutilizing its features, clearly!)