Separator Separator separator1 = new Separator();Separator separator2 = new Separator();Button button1 = new Button("Button1");Button button2 = new Button("Button2");Button button3 = new Button("Button3");Button button4 = new Button("Button4");HBox hBox = new HBox(button3, separator2, button4);separator2.setOrientation(Orientation.VERTICAL);separator2.setPrefWidth(20);separator2.setValignment(VPos.CENTER);separator2.setHalignment(HPos.CENTER);