• 一个可扩展的面板，包括标题、内容
• 与TitledPane配合一起使用
  

    public static Accordion demo1() {
        // 创建Accordion
        Accordion accordion = new Accordion();
        // 内边距
        accordion.setPadding(new Insets(10, 10, 10, 10));

        for (int i = 1; i <= 10; i++) {
            TitledPane titledPane = new TitledPane();
            titledPane.setText("TitledPane " + i);
            titledPane.setNodeOrientation(NodeOrientation.LEFT_TO_RIGHT);
            ScrollPane scrollPane = new ScrollPane();
            FlowPane flowPane = new FlowPane();
            flowPane.setOrientation(Orientation.VERTICAL);
            flowPane.prefWidthProperty().bind(scrollPane.widthProperty().subtract(20));
            scrollPane.setContent(flowPane);
            for (int j = 1; j <= 10; j++) {
                Button button = new Button("Button " + j);
                flowPane.getChildren().add(button);
            }
            titledPane.setContent(scrollPane);
            accordion.getPanes().add(titledPane);
        }

        // 展开第一个
        accordion.setExpandedPane(accordion.getPanes().get(0));

        return accordion;
    }