Javafx fails to start in Intelij

[ennishol]

Jbang version 0.60.0

Tried jfx.java example on command line and it works, but not with Intelij:

jbang edit --open=idea --live jfx.java

and get the error:

.jbang/cache/projects/jfx.java_jbang_01809bfbfddbb84e2f783abac9790b5019cd22f549b149feb1a1990e1d6d7d46/jfx/src/jfx.java:18: error: cannot access EventTarget
        stage.setScene(scene);
             ^
  class file for javafx.event.EventTarget not found

Code

//DEPS org.openjfx:javafx-controls:14.0.2:${os.detected.jfxname}
//DEPS org.openjfx:javafx-graphics:14.0.2:${os.detected.jfxname}
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;


public class jfx extends Application {

    @Override
    public void start(Stage stage) {
        String javaVersion = System.getProperty("java.version");
        String javafxVersion = System.getProperty("javafx.version");
        Label l = new Label("Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".");
        Scene scene = new Scene(new StackPane(l), 640, 480);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }

}```

[maxandersen]

which version of intellij and which version of java is intelliji running with ?

[ennishol]

@maxandersen in shell from which I start edit java is 'build 14.0.1+7'

Project structure in InteliJ showing also java 14.0.1.

InteliJ about:

IntelliJ IDEA 2020.3.1 (Community Edition)
Build #IC-203.6682.168, built on December 29, 2020
Runtime version: 11.0.9.1+11-b1145.63 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Current Desktop: ubuntu

[ennishol]

same on windows, btw

[jeffmaury]

Seems to be an issue with Gradle as your can reproduce with the Gradle wrapper.

The problem seems related to classifiers: both dependencies depends on javafx-base (without classifier).
javafx-base has a dependency on javafx-base:${javafx.platform) and it turns out Gradle does not bring this one into the classpath

[maxandersen]

I think this is an unfortunate sideeffect of javafx weird module path dependency.

not sure how to handle this uniformly as it requires setting up module paths...afaics

[jeffmaury]

Seems Javafx needs a special Gradle setting: https://openjfx.io/openjfx-docs/#gradle

[maxandersen]

yeah, its a problem of jdk's incomplete understanding of modules and javafx's reliance on external tools that makes this one tricky.

best option (for now) is to import as eclipse project as then you get the full classpath; but run via jbang jfx.java as intellij doesn't know how to proper launch jfx without help from things like openjfx gradle.