我用的是Jfoenix，JFXDialog没有出现。
我究竟做错了什么 ？这是代码：
JFXDialogLayout content= new JFXDialogLayout();
content.setHeading(new Text("Error, No selection"));
content.setBody(new Text("No student selected"));
StackPane stackpane = new StackPane();
JFXDialog dialog =new JFXDialog(stackpane, content, JFXDialog.DialogTransition.CENTER);
JFXButton button=new JFXButton("Okay");
button.setOnAction(new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent event){
dialog.close();
}
});
content.setActions(button);
dialog.show();