public static int getRetinaScale(int shareScreenNumber) {
        int scale = 1;
        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        final GraphicsDevice[] devices = env.getScreenDevices();
        GraphicsConfiguration conf = devices[shareScreenNumber].getDefaultConfiguration();
        scale = (int)conf.getDefaultTransform().getScaleX();
       return scale;
    }