I started a new JavaFX application with the JavaFX project template that IntelliJ gives you that will only display a GUI created with Scene Builder with some line charts, as far as I'm concerned, the code is right and simple, it's just a test project.

Also, I can't visualize the .class file in IntelliJ

The message is:

Error occurred during initialization of boot layer
java.lang.module.FindException: Error reading module: C:\Users\pv3\Desktop\PruebasFX_OracleFXProyectInicio\target\classes
Caused by: java.lang.module.InvalidModuleDescriptorException: GraficasVentPrueba1.class found in top-level directory (unnamed package not allowed in module)
    
Process finished with exit code 1

My code:

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;
import java.io.IOException;


public class GraficasVentPrueba1 extends Application {

    @Override
    public void start(Stage stage) throws IOException{
        FXMLLoader launcherGraficas = new FXMLLoader(GraficasVentPrueba1.class.getResource("GraficasVentPrueba1.fxml"));
        Scene emergenteGraficas = new Scene(launcherGraficas.load());
        stage.setScene(emergenteGraficas);
        stage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}

It supposed to just open the .fxml. Instead it shows that error message

CodePudding user response：

Java Platform Module System

In your error message, unnamed package not allowed in module is the key here.

Check your module-info.java file created by the JavaFX project template in IntelliJ. Be sure to edit that file to keep up with changes you make.