在Ubuntu上运行JavaFX jar

Question

I'm unable to run jar files of JavaFX applications on my Ubuntu virtual machine and I don't know why. It just says that it can't find the main file of the jar. Other jars of for example Swing applications seem to work fine. This is what I get when I run java -version on Ubuntu:

It seems like it has Java 8 where JavaFX should be included by default, so why can't I run the jars?

Edit: The jar consists of one class that looks like this:

import javafx.application.Application;
import javafx.stage.Stage;

public class Main extends Application {
        public static void main(String[] args) {launch(args);}
        public void start(Stage ps) {
                ps.show();
        }
}

And it was created with the command jar cfe javafxjar.jar Main Main.class

The jar executes without problems on Windows 10, but fails with this message on Ubuntu:

Answer 1

Today I've also bumped into this problem.

In my case the reason was OpenJDK. It does not contain OpenJFX by default.

The solution was: sudo apt-get install openjfx

And now all works like a charm.

Answer 2

Could it be due to the JAVA_TOOL_OPTIONS:

$ unset JAVA_TOOL_OPTIONS
$ java -jar javafxjar.jar