code: public static boolean isHttp(String url) {
  		if (url.length() < 7 || !url.startsWith("http")) {
  			return false;
  		}
  		int i = 4; // "http"
  		if (url.charAt(i) == 's') {
  			i++;
  		}
  		return url.startsWith("://", i);
  	}
docs: True if the URL starts with {@code http://} or {@code https://}.
  
  @since 4.0.0