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

voidresetTime(GregorianCalendar cal)
Sets the time in the given cal to 00:00:00.000 
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
longroundTime(double dt, Calendar tmp)
round Time 
long t = toLongTime(dt);
tmp.setTimeInMillis(t);
int sec = tmp.get(Calendar.SECOND);
return (sec > 30) ? t + (60 - sec) : t - sec;
booleansameTime(Calendar one, Calendar two)
Returns true if the two given calendars are dated on the same time. 
return one.getTimeInMillis() == two.getTimeInMillis();
voidsetDateTimeByString(Calendar theDateTime, String str)
set the calendar value of theDateTime according to a string like "2008-08-08T08:08:08" 
str = str.trim();
String year, month, day;
int i1, i2, iT;
i1 = str.indexOf("-");
i2 = str.indexOf("-", i1 + 1);
iT = str.indexOf('T');
year = str.substring(0, i1);
month = str.substring(i1 + 1, i2);
...
voidsetTime(Calendar cal, int h, int m, int s, int ms)
set Time 
cal.set(Calendar.HOUR_OF_DAY, h);
cal.set(Calendar.MINUTE, m);
cal.set(Calendar.SECOND, s);
cal.set(Calendar.MILLISECOND, ms);
voidsetTime(Calendar cal, String time)
set Time 
int hour = 0;
int minute = 0;
int idx = time.indexOf(':');
if (idx < 0) {
    hour = Integer.parseInt(time);
} else {
    hour = Integer.parseInt(time.substring(0, idx));
    time = time.substring(idx + 1);
...
CalendarsetTime(final Calendar calendat, final String[] test)
set Time 
if (test.length == 3) {
    calendat.set(Calendar.HOUR_OF_DAY, Integer.parseInt(test[0].trim()));
    calendat.set(Calendar.MINUTE, Integer.parseInt(test[1].trim()));
    calendat.set(Calendar.SECOND, Integer.parseInt(test[2].trim()));
if (test.length == 2) {
    calendat.set(Calendar.HOUR_OF_DAY, Integer.parseInt(test[0].trim()));
    calendat.set(Calendar.MINUTE, Integer.parseInt(test[1].trim()));
...
voidsetTimeFrom(Calendar c)
set Time From 
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
voidsetTimeTo0(final Calendar calendar)
set Time To 
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
voidsetTimeToMidnight(GregorianCalendar c)
Sets the time fields (24-hour, minute, second, millisecond) of the specified GregorianCalendar instance to 0 so it subsequently represents midnight of the same day as before. 
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);