JavaFX：当用户单击 X 按钮时显示对话框窗口？

Question

I have a basic JavaFX program and I'm trying to add functionality where if the user clicks the window's X button, a Dialog button appears. How would I hook into the X button?

Answer 1

You can set an EventHandler to the stage's close request:

stage.setOnCloseRequest(new EventHandler<WindowEvent>() {
    @Override
    public void handle(WindowEvent e) {
        // SHOW A DIALOG HERE
        Platform.exit();
        System.exit(0);
    }
});