Convert color string to argb values #fff -> [255,255,255,255] , #abcdef -> [255,171,205,239]

ColorParser.java

package dev.arpan;

public class ColorParser {
    public static void main(String[] args) {
        printColor(parseColorToARGB("#fff"));
        printColor(parseColorToARGB("#abc"));
        printColor(parseColorToARGB("#000"));
        printColor(parseColorToARGB("#ddd"));
        printColor(parseColorToARGB("#abcdef"));
        printColor(parseColorToARGB("#50dddddd"));
    }

    public static void printColor(int[] color) {
        if (color.length != 4) throw new IllegalArgumentException("Invalid color");
        System.out.printf("argb(%d, %d, %d,%d)\n", color[0], color[1], color[2], color[3]);
    }


    private static int[] parseColorToARGB(String colorString) {
        if (colorString.charAt(0) == '#') {
            long color = Long.parseLong(colorString.substring(1), 16);
            if (colorString.length() == 4) {
                color |= (color & 0xF00) << 12 | (color & 0xF00) << 8;
                color |= (color & 0x0F0) << 8 | (color & 0x0F0) << 4;
                color |= (color & 0x00F) << 4 | (color & 0x00F);
                color |= 0xff000000;
            } else if (colorString.length() == 7) {
                color |= 0xff000000;
            } else if (colorString.length() != 9) {
                throw new IllegalArgumentException("Invalid color: " + colorString);
            }
            int a = (int) ((color >> 24) & 0xFF);
            int r = (int) ((color >> 16) & 0xFF);
            int g = (int) ((color >> 8) & 0xFF);
            int b = (int) (color & 0xFF);
            return new int[]{a, r, g, b};
        }
        throw new IllegalArgumentException("Invalid color: " + colorString);
    }
}