Example usage for java.util Calendar add

Introduction

In this page you can find the example usage for java.util Calendar add.

Prototype

public abstract void add(int field, int amount);

Source Link

Document

Adds or subtracts the specified amount of time to the given calendar field, based on the calendar's rules.

Usage

From source file:Main.java

public static Long GetUTCTime() {
    Calendar cal = Calendar.getInstance(TimeZone.getDefault(), Locale.getDefault());
    int zoneOffset = cal.get(Calendar.ZONE_OFFSET);
    int dstOffset = cal.get(Calendar.DST_OFFSET);
    cal.add(java.util.Calendar.MILLISECOND, -(zoneOffset + dstOffset));
    return cal.getTimeInMillis();
}

From source file:Main.java

public static String getStringByOffset(Date date, String format, int calendarField, int offset) {
    String strDate = null;/* w w  w. ja  v a  2s . c om*/
    try {
        Calendar c = new GregorianCalendar();
        SimpleDateFormat mSimpleDateFormat = new SimpleDateFormat(format);
        c.setTime(date);
        c.add(calendarField, offset);
        strDate = mSimpleDateFormat.format(c.getTime());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return strDate;
}

From source file:it.unicaradio.android.models.Transmission.java

private static String adjustTime(String time) {
    SimpleDateFormat formatter = new SimpleDateFormat("HH:mm");
    String adjustedTime = time;//from  w w  w . ja va  2 s  .co  m
    try {
        Date date = formatter.parse(time);
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.add(Calendar.HOUR_OF_DAY, 1);
        adjustedTime = formatter.format(cal.getTime());
    } catch (ParseException e) {
    }

    return adjustedTime;
}

From source file:Main.java

public static String getStringByOffset(Date date, String format, int calendarField, int offset) {
    String strDate = null;//from  w w  w . j a v  a 2  s.c o m
    try {
        Calendar c = new GregorianCalendar();
        SimpleDateFormat mSimpleDateFormat = new SimpleDateFormat(format, Locale.CHINA);
        c.setTime(date);
        c.add(calendarField, offset);
        strDate = mSimpleDateFormat.format(c.getTime());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return strDate;
}

From source file:Main.java

public static Date startOfNextMonth(int startDayOfMonth) {
    Calendar cal = Calendar.getInstance();

    if (cal.get(Calendar.DATE) >= startDayOfMonth)// the end is one day past startDayOfMonth, next month
        cal.add(Calendar.MONTH, 1);

    int lastDayInMonth = cal.getActualMaximum(Calendar.DAY_OF_MONTH);

    if (startDayOfMonth < lastDayInMonth)
        cal.set(Calendar.DATE, startDayOfMonth + 1);
    else {//from   w w w  . jav  a 2  s.  co  m
        cal.add(Calendar.MONTH, 1);
        cal.set(Calendar.DATE, 1);
    }

    return startOfDay(cal.getTime());
}

From source file:com.acmeair.loader.FlightLoader.java

private static Date getArrivalTime(Date departureTime, int mileage) {
    double averageSpeed = 600.0; // 600 miles/hours
    double hours = (double) mileage / averageSpeed; // miles / miles/hour = hours
    double partsOfHour = hours % 1.0;
    int minutes = (int) (60.0 * partsOfHour);
    Calendar c = Calendar.getInstance();
    c.setTime(departureTime);//from   w  w  w.j  a va 2 s  . c  o  m
    c.add(Calendar.HOUR, (int) hours);
    c.add(Calendar.MINUTE, minutes);
    return c.getTime();
}

From source file:com.beligum.core.accounts.UserManager.java

public static User getCurrentUser() {
    User retVal = null;//from  ww w. j a  v  a  2  s  .  co m
    if (Http.Context.current().session().get(SESSION_KEY_USER) != null) {
        Integer id;
        try {
            id = Integer.parseInt(Http.Context.current().session().get(SESSION_KEY_USER));
        } catch (Exception e) {
            return null;
        }
        retVal = UserRepository.find(id);
        if (retVal != null) {
            String currentTimeOut = Http.Context.current().session().get(SESSION_KEY_TIMEOUT);
            if (currentTimeOut == null) {
                retVal = null;
            } else if (DateTimeHelper.getCurrentTime()
                    .before(DateTimeHelper.formatStringToDate(currentTimeOut, "dd/MM/yyyy HH:mm"))) {
                Calendar timeOut = DateTimeHelper.getCurrentTime();
                timeOut.add(Calendar.HOUR, 1);
                Http.Context.current().session().put(SESSION_KEY_TIMEOUT,
                        DateTimeHelper.formatDate(timeOut, "dd/MM/yyyy HH:mm"));
            } else {
                retVal = null;
            }
        }

    }
    return retVal;

}

From source file:com.iflytek.kcloud.web.utils.BookDateUtil.java

/**
 * getDay:??. <br/>/* ww w  .  j a va  2s .  co  m*/
 *
 * @param gap ?(0,1,-1....)
 * @return
 * @author zyyang3
 * @since JDK 1.6
 */
public static String getDay(int gap) {
    Calendar cal = Calendar.getInstance();
    cal.add(Calendar.DAY_OF_MONTH, gap);
    Date date = cal.getTime();
    String day = DateFormatUtils.format(date, "yyyy-MM-dd");
    return day;
}

From source file:Main.java

/**
 * Parses a date/time string from within an XMLTV stream.  Only the local
 * time part of the value is parsed. Timezone specifications are ignored.
 * /*from  w w  w  .j  a va  2  s  . com*/
 * @param str the string
 * @param convertTimezone true to convert date/time values to local time
 * @return the date/time value as a Calendar object
 */
public static Calendar parseDateTime(String str, boolean convertTimezone) {
    // Format looks like: 20111209060000 +1100
    if (str == null)
        return null;
    int year = parseField(str, 0, 4);
    int month = parseField(str, 4, 2);
    int day = parseField(str, 6, 2);
    int hour = parseField(str, 8, 2);
    int minute = parseField(str, 10, 2);
    int second = parseField(str, 12, 2);
    if (convertTimezone) {
        if (cachedTimeZone == null) {
            cachedTimeZone = TimeZone.getDefault();
            cachedOffset = cachedTimeZone.getOffset(System.currentTimeMillis());
        }
        int tz = parseTZField(str, 14);
        if (tz != cachedOffset) {
            Calendar calendar = new GregorianCalendar(year, month - 1, day, hour, minute, second);
            calendar.add(Calendar.MILLISECOND, cachedOffset - tz);
            return calendar;
        }
    }
    return new GregorianCalendar(year, month - 1, day, hour, minute, second);
}

From source file:Main.java

public static Date getLastWeekMonday() {
    Calendar cal = Calendar.getInstance();
    for (int mondays = 0; mondays < 2;) {
        if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY) {
            mondays++;/*from   ww w.  ja v a 2  s .c  o  m*/
        }
        cal.add(Calendar.DAY_OF_WEEK, -1);
    }
    return cal.getTime();
}