Java: Display Screen Resolution Aspect Ratio

DisplayScreenResolutionAspectRatio.java

/**
     * Returns the aspect ratio in "X:Y" format of given width and height
     * e.g. getAspectRatio(1024, 768) > "4:3"
     * e.g. getAspectRatio(1920, 1080) > "16:9"
     * e.g. getAspectRatio(3440, 1440) > "21:9"
     * <p>
     * This function also works for 1366, 768 which is mathematically not 16:9, but marketed as such.
     *
     * @param width         e.g. 1920
     * @param height        e.g. 1080
     * @return aspectRatio  "16:9"
     */
    public String getAspectRatio(int width, int height) {

        // Define aspect ratios and calculate their decimal conversions
        // List from https://en.wikipedia.org/wiki/Display_aspect_ratio
        List<String> ratios = Arrays.asList("4:3", "5:4", "3:2", "16:10", "16:9", "17:9", "21:9", "32:9", "1:1");
        List<Double> ratiosDecimals = new ArrayList<>();
        for (String ratio : ratios) {
            int w = Integer.parseInt(ratio.split(":")[0]);
            int h = Integer.parseInt(ratio.split(":")[1]);
            ratiosDecimals.add((double) w / h);
        }

        // Calculate absolute difference between given aspect ratio and the defined aspect ratios
        double ratioArgs = (double) width / height;
        List<Double> ratiosDiffs = new ArrayList<>();
        for (Double ratioDec : ratiosDecimals) {
            ratiosDiffs.add(Math.abs(ratioArgs - ratioDec));
        }

        // Determine and return closest available aspect ratio
        int index = ratiosDiffs.indexOf(Collections.min(ratiosDiffs));
        return ratios.get(index);
    }