ExecutorService exec = Executors.newCachedThreadPool();

TableColumn<Model, File>= new TableColumn<>("");
colImage.setPrefWidth(64);
colImage.setCellFactory(param -> {

    //Set up the ImageView
    final ImageView imageview = new ImageView();
    imageview.fitWidthProperty().bind(Bindings.subtract(colImage.widthProperty(), 7));
    imageview.setPreserveRatio(true);

    //Loading task
    ObjectProperty<Task<Image>> loadingTask = new SimpleObjectProperty<>();

    //Set up the Table
    TableCell<Model, File> cell = new TableCell<Model, File>() {
        @Override
        public void updateItem(File item, boolean empty) {
            //Stop already running image fetch tast
            if (loadingTask.get() != null &&
                    loadingTask.get().getState() != Worker.State.SUCCEEDED &&
                    loadingTask.get().getState() != Worker.State.FAILED) {

                loadingTask.get().cancel();
            }
            loadingTask.set(null);
            //Load image if not null
            if (empty || item == null) {
                imageview.setVisible(false);
            } else {
                imageview.setVisible(true);
                Task<Image> task = new Task<Image>() {
                    @Override
                    public Image call() throws Exception {
                        System.out.println("fetch image");
                        Image image = SwingFXUtils.toFXImage(ImageIO.read(item), null);
                        return image;
                    }
                };
                loadingTask.set(task);
                task.setOnSucceeded(event -> {
                    imageview.setImage(task.getValue());
                    System.out.println("got image");
                });
                exec.submit(task);
            }
        }
    };
    // Attach the imageview to the cell
    cell.setGraphic(imageview);
    return cell;

});
colImage.setCellValueFactory(cellData -> cellData.getValue().fileProperty());
tableView.getColumns().add(0, colImage);