Error: JavaFX runtime components are missing, and are required to run this application

[nnsns]

I'm trying to run the very first program from the book.

I'm doing everything as described in Listing 2-5.

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>FXGLearn01App</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.github.almasb</groupId>
            <artifactId>fxgl</artifactId>
            <version>17.3</version>
        </dependency>
    </dependencies>

</project>

FXGLearn01App

package org.example;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

public class FXGLearn01App extends Application {
    public static void main(String[] args) {
        FXGLearn01App.launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        stage.setScene(new Scene(new Pane(), 800, 600));
        stage.show();
    }

}

But when I run it, I get an error: JavaFX runtime components are missing, and are required to run this application.

What am I doing wrong?

[AlmasB]

Hi, thanks for this. It seems the IDE isn't picking up JavaFX modules. You can try adding this workaround as a 2nd class that launches your JavaFX application:

public class Launcher {
    public static void main(String[] args) {
        Application.launch(FXGLearn01App.class, args);
    }
}

Later examples use FXGL, rather than JavaFX, so hopefully there won't be issues of this type.

[nnsns]

That helped! 🔥

I really don't understand what prevented the IDE from working correctly with the first version of the code and what helped the IDE work correctly this time. 😄

I tried the following examples (where com.almasb.fxgl.app.GameApplication is used) from book and they are works fine. 😃 Thank you!