Java Utililty Methods Calendar Time

List of utility methods to do Calendar Time

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Description

The list of methods to do Calendar Time are organized into topic(s).

Method

intcalendar2TimeStamp(Calendar cal)
calendar Time Stamp 
return (int) (cal.getTimeInMillis() / 1000L);
CalendarcalendarFromString(String dateString, String timeString)
Returns calendar instance created from given date string. 
if (dateString.length() < 10)
    return null;
if (timeString.length() < 8)
    return null;
GregorianCalendar cal = new GregorianCalendar();
try {
    int day = Integer.parseInt(dateString.substring(0, 2));
    int month = Integer.parseInt(dateString.substring(3, 5));
...
longcalendarToGPSTime(Calendar calendar)
Takes a date string of the form dd-mm-yyyy hh:mm:ss and converts it into a GPS time representing the number of seconds since 01-06-1980 00:00:00. 
return calendar.getTimeInMillis() / 1000L - GPS_UNIX_EPOCH_OFFSET;
CalendarceilTime(Calendar calendar)
Returns a new Calendar with the same date of given calendar but with all time fields setted to their max value ( Calendar#HOUR_OF_DAY to 23, Calendar#MINUTE to 59, Calendar#SECOND to 59, Calendar#MILLISECOND to 999). 
if (calendar != null) {
    Calendar c = (Calendar) calendar.clone();
    c.set(Calendar.HOUR_OF_DAY, 23);
    c.set(Calendar.MINUTE, 59);
    c.set(Calendar.SECOND, 59);
    c.set(Calendar.MILLISECOND, 999);
    return c;
return calendar;
voidclearCalendarTime(Calendar cal)
Clears the time portion of the specified Calendar , setting the hour, minute, second, and millisecond parts to 0. 
if (cal == null) {
    throw new IllegalArgumentException("The calendar must be defined.");
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
voidclearCalendarTimeParts(Calendar cal)
clear Calendar Time Parts 
cal.set(Calendar.HOUR_OF_DAY, cal.getActualMinimum(Calendar.HOUR_OF_DAY));
clearCalendarMinuteWithRear(cal);
voidclearTime(Calendar c)
clear Time 
c.set(Calendar.HOUR_OF_DAY, 10);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
voidclearTime(Calendar cal)
clear Time 
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
voidclearTime(Calendar cal)
Clears the time component on a Calendar object. 
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.clear(Calendar.MINUTE);
cal.clear(Calendar.SECOND);
cal.clear(Calendar.MILLISECOND);
voidclearTime(Calendar calendar)
clear Time 
calendar.clear(Calendar.HOUR);
calendar.clear(Calendar.HOUR_OF_DAY);
calendar.clear(Calendar.MINUTE);
calendar.clear(Calendar.SECOND);
calendar.clear(Calendar.MILLISECOND);
calendar.clear(Calendar.AM_PM);