JAVA EE: How to use isLenient() method of java.text.DateFormat class

Tuesday, 15 January 2019

How to use isLenient() method of java.text.DateFormat class | Datetimeformatter in java

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DateFormatDemo.java

import java.text.DateFormat;

public class DateFormatDemo

{

    public static void main(String[] args)

    {

        DateFormat dateFormat = DateFormat.getDateTimeInstance();

        System.out.println(dateFormat.getCalendar());

        /*

         * Returns:true if the calendar is lenient; false otherwise.

         */

        System.out.println(dateFormat.isLenient());

        /*

         * Specify whether or not date/time parsing is to be lenient.

         * With lenient parsing, the parser may use heuristics to

         * interpret inputs that do not precisely match this object's

         * format. With strict parsing, inputs must match this

         * object's format.

         * 

         * Parameters:

         * 

         * lenient - when true, parsing is lenient

         */

        dateFormat.setLenient(false);

        System.out.println(dateFormat.getCalendar());

        System.out.println(dateFormat.isLenient());

    }

}

Output:

java.util.GregorianCalendar[time=-978121818376,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Calcutta",offset=19800000,dstSavings=0,useDaylight=false,transitions=6,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=1939,MONTH=0,WEEK_OF_YEAR=1,WEEK_OF_MONTH=1,DAY_OF_MONTH=3,DAY_OF_YEAR=3,DAY_OF_WEEK=3,DAY_OF_WEEK_IN_MONTH=1,AM_PM=0,HOUR=9,HOUR_OF_DAY=9,MINUTE=23,SECOND=1,MILLISECOND=624,ZONE_OFFSET=21200000,DST_OFFSET=0]

true

java.util.GregorianCalendar[time=-978121818376,areFieldsSet=true,areAllFieldsSet=true,lenient=false,zone=sun.util.calendar.ZoneInfo[id="Asia/Calcutta",offset=19800000,dstSavings=0,useDaylight=false,transitions=6,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=1939,MONTH=0,WEEK_OF_YEAR=1,WEEK_OF_MONTH=1,DAY_OF_MONTH=3,DAY_OF_YEAR=3,DAY_OF_WEEK=3,DAY_OF_WEEK_IN_MONTH=1,AM_PM=0,HOUR=9,HOUR_OF_DAY=9,MINUTE=23,SECOND=1,MILLISECOND=624,ZONE_OFFSET=21200000,DST_OFFSET=0]

false