Get Hijri date from future Gregorian date

Question

How am I able to get hijradate from the code below but instead of now() I would like to get this from a future date.

java.time.chrono.HijrahDate hijradate = java.time.chrono.HijrahDate.now();
System.out.println("hijradate "+hijradate);

Answer 1

It’s straightforward when you know how:

    LocalDate gregorianDate = LocalDate.of(2019, Month.FEBRUARY, 22);
    HijrahDate hijradate = HijrahDate.from(gregorianDate);
    System.out.println(hijradate);

This printed

Hijrah-umalqura AH 1440-06-17

If by Gregorian date you meant that you had your date in a GregorianCalendar object (typically from a legacy API that you cannot change or don’t want to change just now):

    GregorianCalendar gregCal = // ...

    ZonedDateTime gregorianDateTime = gregCal.toZonedDateTime();
    System.out.println(gregorianDateTime);
    HijrahDate hijradate = HijrahDate.from(gregorianDateTime);
    System.out.println(hijradate);

Output in one run on my computer was:

2019-02-22T00:00+03:00[Asia/Riyadh]
Hijrah-umalqura AH 1440-06-17

EDIT: For the sake of completeness here are my imports so you know exactly which classes I am using:

import java.time.LocalDate;
import java.time.Month;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.chrono.HijrahDate;
import java.util.GregorianCalendar;

EDIT: To get the month: use your search engine. I used mine and found:

    int month = hijradate.get(ChronoField.MONTH_OF_YEAR);
    System.out.println(month);
    String formattedMonthName 
            = hijradate.format(DateTimeFormatter.ofPattern("MMMM", new Locale("ar")));
    System.out.println(formattedMonthName);

This prints

6
جمادى الآخرة

The last lines are inspired from this answer.