Java Date Before isBeforeCommonEra(Date date)

Description

Returns true if the date is before the common era.

License

Open Source License

Declaration

private static boolean isBeforeCommonEra(Date date) 

Method Source Code

//package com.java2s;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    /**/*www.  j  a  va2 s  .com*/
     * The UTC time zone.
     */
    private static final ThreadLocal<TimeZone> UTC_TZ = new ThreadLocal<TimeZone>() {
        @Override
        protected TimeZone initialValue() {
            return TimeZone.getTimeZone("UTC");
        }
    };

    /**
     * Returns true if the date is before the common era.
     */
    private static boolean isBeforeCommonEra(Date date) {
        Calendar cal = getCalendarUTC();
        cal.setTime(date);
        return cal.get(Calendar.ERA) == GregorianCalendar.BC;
    }

    /**
     * Get a UTC calendar with Locale US.
     */
    private static Calendar getCalendarUTC() {
        return new GregorianCalendar(UTC_TZ.get(), Locale.US);
    }
}

Related

1. isAtLeastOneDayBefore(Date daybefore, Date dayafter)
2. isBefore(Date date)
3. isBefore(Date date1, Date date2)
4. isBefore2015(Date date)
5. isBefore_day(Date time1, Date time2, int days)
6. isBeforeDate(long time1, long time2)
7. isBeforeEndOfDate(Date subject, Date predicate)
8. isDataBeforeData2TruncByDay(Date data1, Date data2)
9. isDateBeforeCurrentDate(Date date)