I have found a number of topics on this subject, with lots of examples using various libraries, and none of them work, even when the example includes a complete example with import, setup, draw...

And the hack did not work for me. I just get a blank grey screen, and when I hit esc, it proceeds and says the user hit cancel. But I never see a file finder. just a grey screen.

I tried the example from java doc, did not work either.

The sojamo sDrop library did work for me. I dropped the jar file in the code folder. I would still prefer a "file browser" to this "drag and drop" method of passing a file to my application.