Java Convert LocalDateTime to Calendar

In this Java core tutorial we learn how to convert a java.time.LocalDateTime object into java.util.Calendar object in Java programming language.

How to convert LocalDateTime to Calendar in Java

In Java to convert a LocalDateTime object to Calendar we can follow the steps below.

First step, convert the LocalDateTime to Instant object.
Second step, create new Date object from the above Instant.
Finally create new instance of Calendar and use setTime() method to set Date value.

ConvertLocalDateTimeToCalendarExample1.java

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;

public class ConvertLocalDateTimeToCalendarExample1 {
    public static void main(String... args) {
        LocalDateTime localDateTime = LocalDateTime.now();
        Instant instant = localDateTime.atZone(ZoneId.systemDefault()).toInstant();
        Date date = Date.from(instant);
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);

        System.out.println("LocalDateTime: " + localDateTime);
        System.out.println("Calendar: " + calendar);
    }
}

The output as below.

LocalDateTime: 2022-04-24T13:20:43.148304
Calendar: java.util.GregorianCalendar[time=1650781243148,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Bangkok",offset=25200000,dstSavings=0,useDaylight=false,transitions=3,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2022,MONTH=3,WEEK_OF_YEAR=18,WEEK_OF_MONTH=5,DAY_OF_MONTH=24,DAY_OF_YEAR=114,DAY_OF_WEEK=1,DAY_OF_WEEK_IN_MONTH=4,AM_PM=1,HOUR=1,HOUR_OF_DAY=13,MINUTE=20,SECOND=43,MILLISECOND=148,ZONE_OFFSET=25200000,DST_OFFSET=0]

Happy Coding 😊

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