CODEWITHSUNDEEP
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Tanvi Jaywant
Tanvi Jaywant

Reputation: 415

How to find start of 3 months before today in Java?

final Calendar tentativeStartDate =  Calendar.getInstance();
    tentativeStartDate.set(Calendar.MILLISECOND, 0);
    tentativeStartDate.set(Calendar.SECOND, 0);
    tentativeStartDate.set(Calendar.MINUTE, 0);
    tentativeStartDate.set(Calendar.HOUR, 0);
    tentativeStartDate.set(Calendar.DATE, 1);
    tentativeStartDate.add(Calendar.MONTH, -3);

I want start of 3 months prior to current month. eg if today is june 18, i want midnight April 1 at 0 mins/seconds. [ April 1st, 00:00:00 ]

But this logic is not giving me the right answer. Is there a better/different way in Java ?

Upvotes: 0

Views: 839

Answers (1)

Mena
Mena

Reputation: 48444

With Java 8, you can use a fluent idiom as follows:

Zoned

ZonedDateTime.now([your zone ID, e.g. ZoneId.systemDefault()])
    // month offset
    .minusMonths(2)
    // start at day 1
    .withDayOfMonth(1)
    // change time-of-day to when the day starts
    .truncatedTo(ChronoUnit.DAYS)

Local

LocalDate.now([your zone ID, e.g. ZoneId.systemDefault()])
    .minusMonths(2)
    .withDayOfMonth(1)

Note

I set the month offset to 2 since you want April.

Upvotes: 7

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