Internal graphics not initialized yet: javafx

Question

I'm trying to write a javaFx application whit multiple images inside a window.
The short story is that I have an enum class named Candy and each candy has some properties and a path to the image file representing it.
In the constructor of my javafx.application class (Table) I want to fill an array list with those images, so I wrote this so far:

public class Table extends Application {

    ArrayList<Image> images;

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setTitle("CandyFx");
        primaryStage.show();
    }

    public Table() {
        images = new ArrayList<Image>();
        for (Candy candy : Candy.values()) {
            File file = new File (candy.getImagePath());
            Image image = new Image(file.toURI().toString());
            images.add(image);
        }
    }
}

Now every time I want to create an instance of Table class, the application throws a java.lang.RuntimeException: Internal graphics not initialized yet.
How can I initial graphics which it seems I did not?

Answer 1

First of all if you are using linux ,GTK 2.18 is required to run JavaFX .try to install

libswt-gtk-3-java

This exception will thrown whenever your screen is null .Try to create your images inside start method. Just before the primaryStage.show();.

Take a look at this link too

http://cr.openjdk.java.net/~vadim/RT-33475/webrev.00/modules/graphics/src/main/java/com/sun/glass/ui/Screen.java.html

Answer 2

I have no idea how it exactly works, but when we first create a JFXPanel in our start we don't get the errors anymore.

JFXPanel jfxPanel = new JFXPanel();