`module-info.java` ``` module sample { requires javafx.controls; requires javafx.graphics; requires javafx.fxml; opens sample ; } ``` or `--module-path /path/to/lib --add-modules javafx.controls,javafx.fxml` Reference: https://stackoverflow.com/questions/56307973/cannot-access-class-com-sun-javafx-util-utils-in-module-javafx-graphics-java