java - JavaFX: Making an Object with a Shape and Text -

i trying make object can added pane. object contain shape , text.

through invoking:

pane#getchildren()#add(new textellipse(...)) 

it add ellipse text in center referenced pane.

my class such object represented below:

    public class textellipse extends shapeellipse {          public textellipse(final string text, final double x, final double y) {             super(text, x, y);         }  @override     protected shape createshape() {         final double padding = 10;         final ellipse ellipse = new ellipse();         ellipse.setradiusx(gettext().getlayoutbounds().getwidth() / 2 + padding);         ellipse.setradiusy(10);         ellipse.setstroke(color.black);         ellipse.setfill(color.white);         return ellipse;     }     }   public abstract class textshape extends pane {     private final text text;     private final shape shape;      public textshape(final string text, final double x, final double y) {         this.text = new text(x, y, text);         shape = createshape();     }      protected abstract shape createshape();      public text gettext() {         return text;     }      public shape getbackgroundshape() {         return shape;     } } 

i've followed d.j. brown's method - however, when invoke

pane#getchildren()#add(new textellipse(...)) 

nothing shows on canvas.

however, when do:

pane#getchildren()#add(new textellipse(...)#getbackgroundshape()) 

the ellipse show up.

why won't ellipse , text show if add textellipse object?

this works

public class textellipse extends stackpane{     private final ellipse bubble;     private final text text;      textellipse(string text, double x, double y)     {                     this.text = new text(x, y, text);         system.out.println(this.text.getboundsinlocal().getwidth());         bubble = new ellipse (x, y, this.text.getboundsinlocal().getwidth() + 5, 15);         bubble.setfill(color.yellow);         getchildren().addall(bubble, this.text);     } }