Color转换为16进制显示

    public static String toHexEncoding(Color color) {
        String R, G, B;
        StringBuffer sb = new StringBuffer();

        R = Integer.toHexString(color.getRed());
        G = Integer.toHexString(color.getGreen());
        B = Integer.toHexString(color.getBlue());

        R = R.length() == 1 ? "0" + R : R;
        G = G.length() == 1 ? "0" + G : G;
        B = B.length() == 1 ? "0" + B : B;

        sb.append("0x");
        sb.append(R);
        sb.append(G);
        sb.append(B);

        return sb.toString();
    }