java - JavaFx, pane not displaying the browser -

i have javafx interface generated scenebuilder...so have view components in sample.fxml. when start application looks : http://i.imgur.com/3tj0tn9.png in blue pane want add browser ( jxbrowser library), did this:

 public void loadmap(actionevent actionevent) {     initcomponents(); //setting buttons visibility      browser browser = new browser();     browserview browserview = new browserview(browser);     gamepane.getchildren().add(browserview);     browser.loadurl("http://www.google.com");      gamepane.getchildren().add(new button("random")); } 

this main:

public class main extends application {  @override public void start(stage primarystage) throws exception{     parent root = fxmlloader.load(getclass().getresource("sample.fxml"));     primarystage.settitle("google maps ");     primarystage.setscene(new scene(root));     primarystage.show(); }   public static void main(string[] args) {     launch(args); } 

}

that button added, browser won't appear..what can do?i used in swing , worked,but here seems not. browser loaded(because specific messages in console) isn't displayed.