NO, java is not correct!
I try to reproduce Your issue:
-with installed java (10 or 9) from system =>nothing happens
-with jre8 from SH3D all work as expected.
So, blame the Ubuntu's java, like I do with my debian's java
----------------------------------------
A computer program does what you tell it to do, not what you want it to do. Murphy's Law
When all else fails, read the instructions. Murphy's Law
If you don't like "AS IS", DIY. Dorin's law
