Оптимизируй java
public String cronMskTzConvert(String cronExpression) {
String[] cronArray = cronExpression.split(” “);
String hour = cronArray[2];
if (hour.equals(“*”)) {
return cronExpression;
}

if (hour.contains(COMMA)) {
cronArray[2] = convertHours(hour, COMMA);
} else if (hour.contains(DASH)) {
cronArray[2] = convertHours(hour, DASH);
} else {
cronArray[2] = String.valueOf(convertHours(Integer.parseInt(hour)));
}

return String.join(” “, cronArray);
}