试图在 controller class 中更改图像（FXML）的 url（javafx）

Question

How to change the url thats in the tag in the FXML file with my controller.

The Image is nested in pane > childeren > Imageview > image see picture

What I want

I want to loop through the imagevies to check the coordinates and with the right coordinate change the url.

This is my loop

for (int i=0; i < 54; i++) {
    if (objectsPane.getChildren().get(i).getLayoutX() == village.getX() && objectsPane.getChildren().get(i).getLayoutY() == village.getY()) {
        objectsPane.getChildren().get(i). // Setting the url
    }

}

How to achieve this?

Answer 1

First of all you need to do a type casting, because objectsPane.getChildren().get(i) gives you the ImageView as of the type Node . Then you can create a new image with the new url. As James commented, it is not possible to just change the url. Finally you replace the old image with the new one. Your code could then look something similar like this:

for (int i = 0; i < 54; i++) {
    if (objectsPane.getChildren().get(i).getLayoutX() == village.getX() && objectsPane.getChildren().get(i).getLayoutY() == village.getY()) {

        // Type cast from Node to ImageView:
        ImageView imageView = (ImageView) objectsPane.getChildren().get(i);

        // Create new image with new url:
        Image image = new Image(getClass().getResourceAsStream("/assets/img/gameobjects/new-image.png"));

        // Replace the old with the new image:
        imageView.setImage(image);

        // Or alternatively as a one-liner:
        //((ImageView) objectsPane.getChildren().get(i)).setImage(new Image(getClass().getResourceAsStream("/assets/img/gameobjects/new-image.png")));
    }
}