hiding the cursor in a full screen java application on the Mac using webstart

I have a fullscreen Java application in which I need to hide the cursor on a Mac. I've created the transparent cursor as instructed here and elsewhere, which works fine on Windows. It does not work on the Mac. I've tried a both a system command and a native command to get ride of it, but that only works when I run it locally on my own computer. When I compile it and upload it to a server using webstart, then download it and run it, it no long works.

I've attempted simply changing the cursor to one of the default 开发者_JS百科cursers, and that does not work on startup either. Both the invisible cursor and default cursor do work once I move the cursor up to the top of the screen, but I need it to be invisible immediately. I have setUndercorated set to true.

I've searched everywhere and found answers that work on windows, or that work when I run locally on my Mac, but nothing that works when the application is downloaded and run on any Mac.