javafx - change achorpane effect after closing another screen -

i have fxml file called principale.fxml contain buton. when click on stage opened , boxblur effect added anchorpane in principale.fxml. iwant set effect null anchorpane when close second stage here code:

principale.fxml

 info.addeventhandler(mouseevent.mouse_clicked, new eventhandler<mouseevent>() {                 @override                     public void handle(mouseevent event) {                         parent home_page_p = fxmlloader.load(getclass().getresource("/view/information.fxml"));                          scene home_page_s = new scene (home_page_p);                         javafx.scene.effect.boxblur bxb = new boxblur();                        ancr.seteffect(bxb);                          stage stage = new stage();                         stage.initstyle(stagestyle.undecorated);                         stage.setscene(home_page_s);                          stage.show();                   } catch (ioexception ex) {                     logger.getlogger(principalecontroller.class.getname()).log(level.severe, null, ex);                 } 

when execute http://i.stack.imgur.com/vafqg.jpg

information.fxml

public void closeapp(mouseevent mv) throws ioexception     {         app_stage = (stage) close.getscene().getwindow();         app_stage.hide();          principalecontroller pc = new principalecontroller();         pc.ancr.seteffect(null);     } 

http://i.stack.imgur.com/vafqg.jpg

so when close information window want set principale.fxml effect null, should add closeapp method?

there multiple issues code. shouldn't type

controller ctl = new controller(); 

rather fetch fxmlloader using

fxmlloader loader = fxmlloader.load(getclass().getresource("/view/information.fxml")); parent home_page_p = loader.load(); controller ctl = loader.getcontroller(); 

later use create new stage :

stage stage = new stage(); stage.initstyle(stagestyle.undecorated); ctl.glisse(home_page_p, stage, home_page_s); stage.setscene(home_page_s); // adding event handler fired on event of stage being closed stage.setoncloserequest((windowevent event) -> {       // perform action when stage closed       ancr.seteffect(null); // ancr reference anchorpane } 

note : don't need create instance of principalecontroller because of above code written inside principalecontroller class.