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


/**
 *
 * @author Alexander Kouznetsov
 */
public class SpaceInStyleBug extends Application{

    @Override
    public void start(Stage primaryStage) {

        Region region = new Region();
        
        // This line causes exception:
        region.setStyle(" -fx-background-color: black;");
        
        // This line is ok
//        region.setStyle("-fx-background-color: black;");
        
        Scene scene = new Scene(region);
        primaryStage.setScene(scene);   
        primaryStage.setVisible(true);
    }

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

}