Different OSes use different "scale" naming convention for high-resolution images:
 Mac OS X: image.ext, image@2x.ext
 Windows: image.scale-100.ext, image.scale-140.ext, image.scale-180.ext

It is better to have a unified way to load high resolution images in JDK.

The proposal is to add a method to the Toolkit class that allows load images with the given scale factors:
  public abstract Image getImage(String[] names, float[] scaleFactors);

The use case is:
        Image multiResolutionImage = Toolkit.getDefaultToolkit().getImage((
                new String[]{"duke1.png", "duke2.png"}, new float[]{1, 2});

Mac OS X naming convention:
        Image multiResolutionImage = Toolkit.getDefaultToolkit().getImage((
                new String[]{"duke.png", "duke@2x.png"}, new float[]{1, 2});

Windows naming convention:
        Image multiResolutionImage = Toolkit.getDefaultToolkit().getImage((
                new String[]{"duke.scale-100.png", "duke.scale-140.png", "duke.scale-180.png"}, new float[]{1.0f, 1.4f, 1.8f});



The loaded multi-resolution image can be used in icon
  new ImageIcon(multiResolutionImage) // resolution variant is used according to the display scale factor
or be drawn by Graphics
  g.drawImage(multiResolutionImage, 0, 0, null) // resolution variant is used according to the current transforms and the display scale factor