DateFormat setCalendar() Method in Java with Examples

The setCalendar() Method of DateFormat class in Java is used to set the calendar associated with this date/time format object. In the initial stage the default settings of calendar is used along with the default locale.

Syntax:

public void setCalendar(Calendar new_calendar)

Parameter: The method takes one parameter new_calendar of Calendar type and refers the new Calendar with which the original DateFormat object is to be replaced.

Return Value: The method does not return any values.

Below programs illustrate the use of setCalendar() method in Java:
Example 1:

// Java code to illustrate
// setCalendar() method

import java.text.*;
import java.util.*;

public class DateFormat_Demo {
    public static void main(String[] argv)
    {
        // Initializing the first formatter
        DateFormat DFormat
            = DateFormat.getDateTimeInstance();

        // String formatting
        String str = DFormat.format(new Date());

        // Displaying the Calendar
        System.out.println("Original Calendar: "
                           + DFormat.getCalendar());

        // Creating a calendar
        Calendar calndr = Calendar.getInstance();

        // Replacing with a new value
        calndr.set(Calendar.MONTH, 11);

        // Setting new Calendar
        DFormat.setCalendar(calndr);

        System.out.println();

        // Displaying the newCalendar
        System.out.println("New Calendar: "
                           + DFormat.getCalendar());
    }
}

Output:

Original Calendar: java.util.GregorianCalendar[time=1553847137520, areFieldsSet=true,
areAllFieldsSet=true, lenient=true, zone=sun.util.calendar.ZoneInfo[id="Etc/UTC",
offset=0, dstSavings=0, useDaylight=false, transitions=0, lastRule=null], firstDayOfWeek=1,
minimalDaysInFirstWeek=1, ERA=1, YEAR=2019, MONTH=2, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5,
DAY_OF_MONTH=29, DAY_OF_YEAR=88, DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8,
HOUR_OF_DAY=8, MINUTE=12, SECOND=17, MILLISECOND=520, ZONE_OFFSET=0, DST_OFFSET=0]

New Calendar: java.util.GregorianCalendar[time=?, areFieldsSet=false, areAllFieldsSet=true,
lenient=true, zone=sun.util.calendar.ZoneInfo[id="Etc/UTC", offset=0, dstSavings=0,
useDaylight=false, transitions=0, lastRule=null], firstDayOfWeek=1, minimalDaysInFirstWeek=1,
ERA=1, YEAR=2019, MONTH=11, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5, DAY_OF_MONTH=29, DAY_OF_YEAR=88,
DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8, HOUR_OF_DAY=8, MINUTE=12, SECOND=17,
MILLISECOND=521, ZONE_OFFSET=0, DST_OFFSET=0]

Example 2:

// Java code to illustrate
// setCalendar() method

import java.text.*;
import java.util.*;

public class DateFormat_Demo {
    public static void main(String[] argv)
    {
        // Initializing the first formatter
        DateFormat DFormat
            = DateFormat.getDateInstance();

        // String formatting
        String str = DFormat.format(new Date());

        // Displaying the Calendar
        System.out.println("Original Calendar: "
                           + DFormat.getCalendar());

        // Creating a calendar
        Calendar calndr = Calendar.getInstance();

        // Replacing with a new value
        calndr.set(Calendar.YEAR, 1996);

        // Setting new Calendar
        DFormat.setCalendar(calndr);
        System.out.println();
        // Displaying the newCalendar
        System.out.println("New Calendar: "
                           + DFormat.getCalendar());
    }
}

Output:

Original Calendar: java.util.GregorianCalendar[time=1553847144311, areFieldsSet=true,
areAllFieldsSet=true, lenient=true, zone=sun.util.calendar.ZoneInfo[id="Etc/UTC",
offset=0, dstSavings=0, useDaylight=false, transitions=0, lastRule=null], firstDayOfWeek=1,
minimalDaysInFirstWeek=1, ERA=1, YEAR=2019, MONTH=2, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5,
DAY_OF_MONTH=29, DAY_OF_YEAR=88, DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8,
HOUR_OF_DAY=8, MINUTE=12, SECOND=24, MILLISECOND=311, ZONE_OFFSET=0, DST_OFFSET=0]

New Calendar: java.util.GregorianCalendar[time=?, areFieldsSet=false, areAllFieldsSet=true,
lenient=true, zone=sun.util.calendar.ZoneInfo[id="Etc/UTC", offset=0, dstSavings=0,
useDaylight=false, transitions=0, lastRule=null], firstDayOfWeek=1, minimalDaysInFirstWeek=1,
ERA=1, YEAR=1996, MONTH=2, WEEK_OF_YEAR=13, WEEK_OF_MONTH=5, DAY_OF_MONTH=29, DAY_OF_YEAR=88,
DAY_OF_WEEK=6, DAY_OF_WEEK_IN_MONTH=5, AM_PM=0, HOUR=8, HOUR_OF_DAY=8, MINUTE=12, SECOND=24,
MILLISECOND=318, ZONE_OFFSET=0, DST_OFFSET=0]