Running the following program on mac leads to the main application window to hang on my mac system, when you attempt to print.


public class PrintSomeText extends Application {
    private Stage stage;
    private TextFlow flow;

    @Override public void start(Stage stage) throws Exception {
        this.stage = stage;
        Font normalFont = Font.font("Helvetica", 96);
        Font boldFont = Font.font("Helvetica", FontWeight.BOLD, 170);
        Font italicFont = Font.font("Helvetica", FontPosture.ITALIC, 96);

        Text hello = new Text("Hello ");
        hello.setFont(normalFont);
        Text bold = new Text("Bold ");
        bold.setFont(boldFont);
        bold.setFill(Color.ORANGE);
        bold.setStroke(Color.BLACK);
        bold.setStrokeWidth(5);
        Text world = new Text("World");
        world.setFont(italicFont);
        world.setFill(Color.RED);

        Menu file = new Menu("File");
        MenuItem print = new MenuItem("Print");
        print.setOnAction(this::print);
        file.getItems().add(print);
        MenuBar bar = new MenuBar();
        bar.setUseSystemMenuBar(true);
        bar.getMenus().add(file);

        flow = new TextFlow(hello, bold, world);
        flow.setTextAlignment(TextAlignment.CENTER);
        flow.setMaxSize(TextFlow.USE_PREF_SIZE, TextFlow.USE_PREF_SIZE);
        Scene s = new Scene(new StackPane(flow, bar), 800, 400);
        stage.setScene(s);
        stage.show();
    }

    private void print(Event e) {
        PrinterJob job = PrinterJob.createPrinterJob();
        if (job != null && job.showPrintDialog(stage)) {
            if (job.printPage(flow)) {
                job.endJob();
            }
        }
    }

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