java - Class extends BufferedImage, but picture can't change. Any way around this? -

i'm trying create simple card class extends bufferedimage can draw card directly on screen. card has 2 faces. front, , back. including flip(boolean faceup) method want change image 1 side next, seems since class extends bufferedimage, it's final? i'm not sure, that's impression. doesn't change original image drawn in constructor. there way around can still paint card directly on-screen? have far...

  public card(int rank, int suit)   {      super(50,70,type_int_argb);      this.rank = rank;      this.suit = suit;      try{bi = imageio.read(getclass().getresource(tostring()+".png"));      = imageio.read(getclass().getresource("back.png"));}      catch(ioexception e){e.printstacktrace();}      graphics2d g = creategraphics();      g.drawimage(back,0,0,null);      g.dispose();   }    public void flip(boolean faceup)   {      this.faceup = faceup;      graphics2d g = creategraphics();      if(faceup)g.drawimage(bi,0,0,null);      else g.drawimage(back,0,0,null);      g.dispose();   } 

don't extend bufferedimage.

instead class can contain 2 bufferedimages:

1. the front
2. the back

then painting method paint front or depending on "flip" property.