boolean checkPassword(String pw){
    int len = pw.length();
    String ePattern = "[\\p{ASCII}áéíóöőúüű]{" + len + "}";
        Pattern p = java.util.regex.Pattern.compile(ePattern);
        Matcher m = p.matcher(first);

        if(!m.matches()){
            ReccosB.showError("A Jelszó nem tartalmazhatja a következő karaktereket: " + findIllegalChars(pw));
            return false;
     }
    return true;
}

/**
 * Returns the characters that doesn't match the regular expression: [\\p{ASCII}áéíóöőúüű] separated with spaces.
 * Repeating characters will appear only once in the return value.
 *
 * Example: findIllegalChars("{ß@}{×}$ßv`°") will return "ß × °"
 */

private String findIllegalChars(String input){

    String pattern = "[\\p{ASCII}áéíóöőúüű]";
    Pattern p = java.util.regex.Pattern.compile(pattern);

    String ret = "";
    for(int i=0; i<input.length(); i++){
        char[] c = new char[1];
        c[0] = input.charAt(i);
        String s = new String(c);
        System.out.println("checkking " + s);

        Matcher m = p.matcher(s);
        if(!m.matches()){
            if(!ret.contains(s))
                ret += s + " ";
        }
    }
    if(ret.compareTo("") == 0)
        return null;
    return ret;
}