Java Calendar.add方法代码示例

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
@Override
public boolean includesDate(Calendar cal) {
    int month = cal.get(Calendar.MONTH);
    if (month == this.start || month == this.end) {
        return true;
    }
    Calendar compareCal = (Calendar) cal.clone();
    while (compareCal.get(Calendar.MONTH) != this.start) {
        compareCal.add(Calendar.MONTH, 1);
    }
    while (compareCal.get(Calendar.MONTH) != this.end) {
        if (compareCal.get(Calendar.MONTH) == month) {
            return true;
        }
        compareCal.add(Calendar.MONTH, 1);
    }
    return false;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
private static long getEvenStartingTime(long binLength) {
    // binLengths should be a divisable evenly into 1 hour
    long curTime = System.currentTimeMillis();

    // find the first previous millis that are even on the hour
    Calendar cal = Calendar.getInstance();

    cal.setTime(new Date(curTime));
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);

    while (cal.getTime().getTime() < (curTime - binLength)) {
        cal.add(Calendar.MILLISECOND, (int) binLength);
    }

    return cal.getTime().getTime();
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
protected Calendar alignDayOfWeek(Calendar cal) {
    cal.set(Calendar.DAY_OF_MONTH, 1);
    if (this.occurrence > 0) {
        while (cal.get(Calendar.DAY_OF_WEEK) != this.dayOfWeek) {
            cal.add(Calendar.DAY_OF_MONTH, 1);
        }
        cal.add(Calendar.DAY_OF_MONTH, (this.occurrence - 1) * 7);
    } else {
        cal.add(Calendar.MONTH, 1);
        cal.add(Calendar.DAY_OF_MONTH, -1);
        while (cal.get(Calendar.DAY_OF_WEEK) != this.dayOfWeek) {
            cal.add(Calendar.DAY_OF_MONTH, -1);
        }
        cal.add(Calendar.DAY_OF_MONTH, (this.occurrence + 1) * 7);
    }
    return cal;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
private void initializeDefaultCenturyStart(long baseTime) {
    defaultCenturyBase = baseTime;
    // clone to avoid messing up date stored in calendar object
    // when this method is called while parsing
    Calendar tmpCal = (Calendar)calendar.clone();
    tmpCal.setTimeInMillis(baseTime);
    tmpCal.add(Calendar.YEAR, -80);
    defaultCenturyStart = tmpCal.getTime();
    defaultCenturyStartYear = tmpCal.get(Calendar.YEAR);
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
@Override
public boolean isSubstitutionCandidate(Calendar cal, TemporalExpression expressionToTest) {
    Calendar checkCal = (Calendar) cal.clone();
    checkCal.add(Calendar.MONTH, -1);
    while (!includesDate(checkCal)) {
        if (expressionToTest.includesDate(checkCal)) {
            return true;
        }
        checkCal.add(Calendar.MONTH, -1);
    }
    return false;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public static Timestamp getHourStart(Timestamp stamp, int hoursLater, TimeZone timeZone, Locale locale) {
    Calendar tempCal = toCalendar(stamp, timeZone, locale);
    tempCal.set(tempCal.get(Calendar.YEAR), tempCal.get(Calendar.MONTH), tempCal.get(Calendar.DAY_OF_MONTH), tempCal.get(Calendar.HOUR_OF_DAY), 0, 0);
    tempCal.add(Calendar.HOUR_OF_DAY, hoursLater);
    Timestamp retStamp = new Timestamp(tempCal.getTimeInMillis());
    retStamp.setNanos(0);
    return retStamp;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public static Timestamp getHourEnd(Timestamp stamp, Long hoursLater, TimeZone timeZone, Locale locale) {
    Calendar tempCal = toCalendar(stamp, timeZone, locale);
    tempCal.set(tempCal.get(Calendar.YEAR), tempCal.get(Calendar.MONTH), tempCal.get(Calendar.DAY_OF_MONTH), tempCal.get(Calendar.HOUR_OF_DAY), 59, 59);
    tempCal.add(Calendar.HOUR_OF_DAY, hoursLater.intValue());
    Timestamp retStamp = new Timestamp(tempCal.getTimeInMillis());
    retStamp.setNanos(0);
    return retStamp;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public static Timestamp getDayEnd(Timestamp stamp, Long daysLater, TimeZone timeZone, Locale locale) {
    Calendar tempCal = toCalendar(stamp, timeZone, locale);
    tempCal.set(tempCal.get(Calendar.YEAR), tempCal.get(Calendar.MONTH), tempCal.get(Calendar.DAY_OF_MONTH), 23, 59, 59);
    tempCal.add(Calendar.DAY_OF_MONTH, daysLater.intValue());
    Timestamp retStamp = new Timestamp(tempCal.getTimeInMillis());
    retStamp.setNanos(0);
    //MSSQL datetime field has accuracy of 3 milliseconds and setting the nano seconds cause the date to be rounded to next day
    //retStamp.setNanos(999999999);
    return retStamp;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public static Timestamp getWeekStart(Timestamp stamp, int daysLater, int weeksLater, TimeZone timeZone, Locale locale) {
    Calendar tempCal = toCalendar(stamp, timeZone, locale);
    tempCal.set(tempCal.get(Calendar.YEAR), tempCal.get(Calendar.MONTH), tempCal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
    tempCal.add(Calendar.DAY_OF_MONTH, daysLater);
    tempCal.set(Calendar.DAY_OF_WEEK, tempCal.getFirstDayOfWeek());
    tempCal.add(Calendar.WEEK_OF_MONTH, weeksLater);
    Timestamp retStamp = new Timestamp(tempCal.getTimeInMillis());
    retStamp.setNanos(0);
    return retStamp;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public Set<Integer> getMinuteRangeAsSet() {
    Set<Integer> rangeSet = new TreeSet<Integer>();
    if (this.start == this.end) {
        rangeSet.add(this.start);
    } else {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, this.start);
        while (cal.get(Calendar.HOUR_OF_DAY) != this.end) {
            rangeSet.add(cal.get(Calendar.HOUR_OF_DAY));
            cal.add(Calendar.HOUR_OF_DAY, 1);
        }
    }
    return rangeSet;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public static Timestamp getMonthStart(Timestamp stamp, int daysLater, int monthsLater, TimeZone timeZone, Locale locale) {
    Calendar tempCal = toCalendar(stamp, timeZone, locale);
    tempCal.set(tempCal.get(Calendar.YEAR), tempCal.get(Calendar.MONTH), 1, 0, 0, 0);
    tempCal.add(Calendar.MONTH, monthsLater);
    tempCal.add(Calendar.DAY_OF_MONTH, daysLater);
    Timestamp retStamp = new Timestamp(tempCal.getTimeInMillis());
    retStamp.setNanos(0);
    return retStamp;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public void testDuration() throws Exception {
    Calendar now = Calendar.getInstance();
    TimeDuration zeroDuration = TimeDuration.ZeroTimeDuration;
    assertFalse("zero equals null", zeroDuration.equals(null));
    Calendar newTime = (Calendar) now.clone();
    zeroDuration.addToCalendar(newTime);
    assertEquals("zero same calendar", now, newTime);
    assertDurationFields("zero(same zero calendar)", 0, 0, 0, 0, 0, 0, 0, "0:0:0:0:0:0:0", new TimeDuration(zero, zero), false, true);
    assertDurationFields("zero(same now calendar)", 0, 0, 0, 0, 0, 0, 0, "0:0:0:0:0:0:0", new TimeDuration(now, now), false, true);
    assertDurationFields("zero(empty parse)", 0, 0, 0, 0, 0, 0, 0, "0:0:0:0:0:0:0", TimeDuration.parseDuration(""), false, true);
    assertDurationFields("zero(zero parse)", 0, 0, 0, 0, 0, 0, 0, "0:0:0:0:0:0:0", TimeDuration.parseDuration("0:0:0:0:0:0:0"), false, true);
    assertDurationFields("zero(from null number)", 0, 0, 0, 0, 0, 0, 0, "0:0:0:0:0:0:0", TimeDuration.fromNumber(null), false, true);
    assertDurationFields("zero(from null number)", 0, 0, 0, 0, 0, 0, 0, "0:0:0:0:0:0:0", TimeDuration.fromNumber(null), false, true);
    assertDuration("millisecond", 0, 0, 0, 0, 0, 0, 1);
    assertDuration("second", 0, 0 ,0 ,0, 0, 1, 0);
    assertDuration("minute", 0, 0, 0, 0, 1, 0, 0);
    assertDuration("hour", 0, 0, 0, 1, 0, 0, 0);
    assertDuration("day",  0, 0, 1, 0, 0, 0, 0);
    assertDuration("month", 0, 1, 0, 0, 0, 0, 0);
    assertDuration("year", 1, 0, 0, 0, 0, 0, 0);
    Calendar start = new com.ibm.icu.util.GregorianCalendar(1967, 1, 1, 0, 0, 0);
    start.set(Calendar.MILLISECOND, 0);
    Calendar end = (Calendar) start.clone();
    end.add(Calendar.MILLISECOND, 1);
    end.add(Calendar.SECOND, 1);
    end.add(Calendar.MINUTE, 1);
    end.add(Calendar.HOUR_OF_DAY, 1);
    end.add(Calendar.DAY_OF_MONTH, 1);
    end.add(Calendar.MONTH, 1);
    end.add(Calendar.YEAR, 1);
    assertDurationFields("pre-epoch elapsed time", 1, 1, 1, 1, 1, 1, 1, "1:1:1:1:1:1:1", new TimeDuration(start, end), false, false);
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
private static int advanceCalendar(Calendar start, Calendar end, int units, int type) {
    if (units >= 1) {
        // Bother, the below needs explanation.
        //
        // If start has a day value of 31, and you add to the month,
        // and the target month is not allowed to have 31 as the day
        // value, then the day will be changed to a value that is in
        // range.  But, when the code needs to then subtract 1 from
        // the month, because it has advanced to far, the day is *not*
        // set back to the original value of 31.
        //
        // This bug can be triggered by having a duration of -1 day,
        // then adding this duration to a calendar that represents 0
        // milliseconds, then creating a new duration by using the 2
        // Calendar constructor, with cal1 being 0, and cal2 being the
        // new calendar that you added the duration to.
        //
        // To solve this problem, we make a temporary copy of the
        // start calendar, and only modify it if we actually have to.
        Calendar tmp = (Calendar) start.clone();
        int tmpUnits = units;
        tmp.add(type, tmpUnits);
        while (tmp.after(end)) {
            tmp.add(type, -1);
            units--;
        }
        if (units != 0) {
            start.add(type, units);
        }
    }
    return units;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
/** Add this time duration to a Calendar instance. Returns the original
 * Calendar instance.
 * @param cal
 * @return <code>cal</code>
 */
public Calendar addToCalendar(Calendar cal) {
    cal.add(Calendar.MILLISECOND, this.milliseconds);
    cal.add(Calendar.SECOND, this.seconds);
    cal.add(Calendar.MINUTE, this.minutes);
    cal.add(Calendar.HOUR, this.hours);
    cal.add(Calendar.DAY_OF_MONTH, this.days);
    cal.add(Calendar.MONTH, this.months);
    cal.add(Calendar.YEAR, this.years);
    return cal;
}
 

import com.ibm.icu.util.Calendar; //导入方法依赖的package包/类
public static Timestamp adjustTimestamp(Timestamp stamp, Integer adjType, Integer adjQuantity) {
    Calendar tempCal = toCalendar(stamp);
    tempCal.add(adjType, adjQuantity);
    return new Timestamp(tempCal.getTimeInMillis());
}