Errrr you dont use Java to download games.
Java is environment / language necessary to launch.
You can get latest here
https://www.java.com/en/download/
After install you need to manually download game package from Itch and run the game .exe file.
it wouldn't let me do a screenshot of the black screen. after the extraction there was no exe application only another extraction in that spot but after the second one i got the black screen that had a blinking white line i was able to text on it. this site wouldnt let me show screen shots so i sent it to f95zone