If I want to use javafx.application.Application How to add some custom code to the start method of Application, that is, rewrite this method, in the 21 version of fxgl?

[huayunliufeng]

Because I want to use the Atlantafx framework（ https://github.com/mkpaz/atlantafx ）To use it, you must add code similar to the following in the start method: `public class Launcher extends Application {

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

@Override
public void start(Stage stage) {
    // find more themes in 'atlantafx.base.theme' package
    Application.setUserAgentStylesheet(new PrimerLight().getUserAgentStylesheet());
    Application.setUserAgentStylesheet(new PrimerDark().getUserAgentStylesheet());

    // the rest of the code ...
}

}`

[AlmasB]

Hi, you can use FXGL with its embedded mode. See sample where the top level is just a normal JavaFX application.

[huayunliufeng]

Thank you very much. After using your solution, my problem has been resolved.