/** * Retain only characters which is {@link #isAz09(int)} * @param src source string, may be null * @return string, null when incoming string is null */ public static String retainAz09(String src) { return retain(src, StringUtils::isAz09); }
/** * Retain chars which is acceptable as file name or part of url on most operation systems. <p/> * It: <code>'A'-'z', '0'-'9', '_', '-', '.'</code> * @param src source string, may be null * @return string, null when incoming string is null */ public static String retainForFileName(String src) { return retain(src, StringUtils::isAz09); }