popupwindow - best way to get return type from a popup window JavaFx -

what best way return type popup window. im creating popup window , has fields need filled in. want return type person these fields.

heres call popup window.

button addbutton = new button("add person interested list"); addpersonadop adp = new addpersonadop(); addbutton.setonaction(e -> table.getitems().add(adp.addbuttonperson())); 

heres popup window class

public class addpersonadop {      private textfield personnameadoption, personaddressadoption, personnoadoption, personemailadoption;      public person display()  {         final stage  window = new stage();         borderpane bp = new borderpane();          window.settitle("add person");          button addperson = new button("add selected animal");         addperson.setonaction(e -> {             window.close();             addbuttonperson();});          button closebutton = new button("close window");         closebutton.setonaction(e -> window.close());          vbox vbox = new vbox(personfieldsadoption(),  addperson, closebutton);         vbox.getchildren().addall();           bp.setcenter(vbox);         scene scene = new scene(bp, 800,800);          window.setscene(scene);         window.show();         return addbuttonperson();      }      public gridpane personfieldsadoption(){          personnameadoption = new textfield();         personnameadoption.setprompttext("name");         personnameadoption.setminwidth(75);          personaddressadoption = new textfield();         personaddressadoption.setprompttext("address");         personaddressadoption.setminwidth(75);          personnoadoption = new textfield();         personnoadoption.setprompttext("phone number");         personnoadoption.setminwidth(75);          personemailadoption = new textfield();         personemailadoption.setprompttext("email");         personemailadoption.setminwidth(75);          gridpane grid = new gridpane();         grid.centershapeproperty();         grid.sethgap(10);         grid.setpadding(new insets(10,10,10,10));         grid.addrow(0, customitems.label("enter persons details"));         grid.addrow(1, new label("person name *"), new label(" address *"), new label("phone number *"), new label("email *"));         grid.addrow(2, personnameadoption, personaddressadoption, personnoadoption, personemailadoption);          return grid;     }      public person addbuttonperson(){          if(personnameadoption.gettext().isempty() || personaddressadoption.gettext().isempty() || personemailadoption.gettext().isempty() || personnoadoption.gettext().isempty())         {             alertbox.warn("some person info missing", "please complete person mandatory fields");             person person = new person("name","add","@", "999");             return person;         }         else{             person person = new person(personnameadoption.gettext(),personaddressadoption.gettext(),personemailadoption.gettext(), personnoadoption.gettext());             return person;         }     }  } 

use window.showandwait() instead of window.show() in display() method.

then

addbutton.setonaction(e -> table.getitems().add(adp.display()));