随机获取十六进制颜色代码

	public static String getRandomColorCode() {
    
    
		String r, g, b;
		Random random = new Random();
		r = Integer.toHexString(random.nextInt(256)).toUpperCase();
		g = Integer.toHexString(random.nextInt(256)).toUpperCase();
		b = Integer.toHexString(random.nextInt(256)).toUpperCase();

		r = r.length() == 1 ? "0" + r : r;
		g = g.length() == 1 ? "0" + g : g;
		b = b.length() == 1 ? "0" + b : b;
		
		return "#"+r+g+b;
	}