I’m trying to make a cross-platform JavaFX application, and it works fine on Windows and OSX machines, but not on Linux.
When I try to run it on a Linux machine using java -jar app.jar, this is what I get:
Error: Could not find or load main class app.Main
But the class app.Main is in the .jar, as shown by ‘jar tf app.jar’:
... app/Main.class ...
I tried specifying the main class using java -cp app.jar app.Main but I got the same error message.
The .jar was built in Intellij IDEA, using basic JavaFX configuration.
So, turns out the problem was that the JRE on the Linux machine was OpenJDK, which does not come with JavaFX, as noted by James_D and jewelsea
After installing the oracle JRE 8, it worked fine
Answered By – Matheus Valin