import javafx.application.*;
import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.image.*;

public class Test extends Application {
    static boolean doscale;

    public void start(Stage stage) {
        Image img = new Image("flower.jpg");
        ImageView iv = new ImageView(img);
        if (doscale) iv.setScaleX(0.8);
        iv.setOpacity(0.3);

        Scene scene = new Scene(new Group(iv), 500, 500);
        stage.setScene(scene);
        stage.setVisible(true);
    }

    public static void main(String argv[]) {
        doscale = (argv.length > 0);
        launch(Test.class, argv);
    }
}