For my example I've created "sprites" for 1x sprites and "sprites-retina" for 2x sprites. In my example I've also created subfolders called `buttons` and `icons` to sprite these as groups. Drop your ...

private Image dartMonkeySelectImage = new ImageIcon("Sprites/Button Sprites/Dart_Monkey.png").getImage().getScaledInstance(50, 50, Image.SCALE_SMOOTH); private Image ...