import javafx.application.Application; import javafx.fxml.FXMLLoader; import javafx.stage.Stage; import javafx.scene.Scene; import javafx.scene.layout.AnchorPane; public class Main extends Application { @Override public void start(final Stage stage) throws Exception { Scene scene = new Scene(FXMLLoader.load(Main.class.getResource("window.fxml"))); scene.getStylesheets().add("stylesheet.css"); stage.setScene(scene); //stage.setResizable(false); // keeps window from resizing stage.setTitle("Image Viewer"); stage.setMinWidth(300); stage.setMinHeight(300); stage.show(); } // needed because you know... it's java. public static void main(String[] args) { launch(args); } }