Calendar roll(int, boolean) in Java

roll(int, boolean): This method is available in java.util.Calendar class of Java.

Syntax:

void java.util.Calendar.roll(int field, boolean up)

This method takes two arguments one of type int and the other of type boolean as its parameters. This method adds or subtracts (up/down) a single unit of time on the given time field without changing larger fields.

Parameters: Two parameters are required for this method.

field: the time field.

up: indicates if the value of the specified time field is to be rolled up or rolled down. Use true if rolling up, false otherwise.

Returns: NA

Exceptions: NA

Approach

Java

import java.util.Calendar;

public class Calendarroll {
    public static void main(String[] args) {

        // create a calendar
        Calendar calendar = Calendar.getInstance();

        int field = 1;
        boolean up = true;
        calendar.roll(field, up);
        System.out.println(calendar.clone());
    }
}

Output:

java.util.GregorianCalendar[time=?,areFieldsSet=false,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Calcutta",offset=19800000,dstSavings=0,useDaylight=false,transitions=7,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2023,MONTH=0,WEEK_OF_YEAR=5,WEEK_OF_MONTH=5,DAY_OF_MONTH=23,DAY_OF_YEAR=23,DAY_OF_WEEK=1,DAY_OF_WEEK_IN_MONTH=4,AM_PM=1,HOUR=10,HOUR_OF_DAY=22,MINUTE=11,SECOND=30,MILLISECOND=299,ZONE_OFFSET=19800000,DST_OFFSET=0]