How to replace setDate and getDate

Question

Deprecated code, how to replace setDate and getDate, right now code works, but I can’t present it like that. I have tried Calendar, and I don’t see how that works. Code point is to move exact amount of days back in my calendar.

public void minusDay() {
    int days = dateRange();
    toDate.setDate(toDate.getDate()-days);

*assuming* it is `java.util.Date`(there are more than 10 `setDate()` methods in Java SE), the [documentation](https://docs.oracle.com/en/java/javase/13/docs/api/java.base/java/util/Date.html#setDate(int)) says: "**Deprecated.** As of JDK version 1.1, replaced by Calendar.set(Calendar.DAY_OF_MONTH, int date)." (most deprecated methods/fields have a message with an alternative) — user85421, Oct 24 '19 at 07:40
You either don't touch your working code or you switch it entirely to using `java.time` instead of `java.util`. — deHaar, Oct 24 '19 at 07:41
Possible duplicate of [How to replace getDate() from the type Date which is deprecated?](https://stackoverflow.com/questions/32694110/how-to-replace-getdate-from-the-type-date-which-is-deprecated) — Ashutosh, Oct 24 '19 at 07:47
`setTime`? [deHaar](https://stackoverflow.com/questions/58536328/how-to-replace-setdate-and-getdate#comment103395477_58536328) means the [`java.base/java.time`](https://docs.oracle.com/en/java/javase/13/docs/api/java.base/java/time/package-summary.html) package - "The main API for **dates**, times, instants, and durations." - and its classes (the not-so-new API to be used instead of `Date`, `Calendar`, ...) — user85421, Oct 24 '19 at 07:50

score 0 · Answer 1 · answered Oct 24 '19 at 08:13

Java 8 Date API supports minusDays and plusDays methods on LocalDateTime instances.

If you don't want to convert your whole system using the Java 8 Date API, then you can just convert your Date object into LocalDateTime and work on it. You will also need to use ZonedDateTime to take into consideration the timezone also for the conversion.

public void minusDay() {
    int days = dateRange();
    LocalDateTime ldt = LocalDateTime.ofInstant(toDate.toInstant(), ZoneId.systemDefault());
    ldt.minusDays(days);
    ZonedDateTime zdt = ldt.atZone(ZoneId.systemDefault());
    toDate = Date.from(zdt.toInstant());
}

Source here.

How to replace setDate and getDate

1 Answers1