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

voidsetTimeToMinOrMax(Calendar cal, boolean max)
set Time To Min Or Max 
if (max) {
    cal.set(Calendar.HOUR_OF_DAY, 23);
    cal.set(Calendar.MINUTE, 59);
    cal.set(Calendar.SECOND, 59);
    cal.set(Calendar.MILLISECOND, 999);
} else {
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.MINUTE, 0);
...
voidstripTime(final Calendar cal)
strip Time 
cal.clear(Calendar.AM_PM);
cal.clear(Calendar.HOUR_OF_DAY);
cal.clear(Calendar.HOUR);
cal.clear(Calendar.MINUTE);
cal.clear(Calendar.SECOND);
cal.clear(Calendar.MILLISECOND);
voidstripTimeComponent(Calendar cal)
Strips the time component from a Calendar object, leaving only the date component 
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
voidtime2InicioDelDia(Calendar fecha)
time Inicio Del Dia 
fecha.set(Calendar.HOUR_OF_DAY, 0);
fecha.set(Calendar.MINUTE, 0);
fecha.set(Calendar.SECOND, 0);
fecha.set(Calendar.MILLISECOND, 0);
Calendartimestamp17ToCalendar(String timestamp17String)
Convert 17-digit date format timestamps (as found in crawl.log, for example) into a GregorianCalendar object. 
GregorianCalendar calendar = new GregorianCalendar();
int year = Integer.parseInt(timestamp17String.substring(0, 4));
int dayOfMonth = Integer.parseInt(timestamp17String.substring(6, 8));
int month = Integer.parseInt(timestamp17String.substring(4, 6)) - 1;
int hourOfDay = Integer.parseInt(timestamp17String.substring(8, 10));
int minute = Integer.parseInt(timestamp17String.substring(10, 12));
int second = Integer.parseInt(timestamp17String.substring(12, 14));
int milliseconds = Integer.parseInt(timestamp17String.substring(14, 17));
...
Calendartimestamp2Calendar(long timestamp)
timestamp Calendar 
Date date = timestamp2Date(timestamp);
Calendar cal = Calendar.getInstance();
cal.setTimeZone(TimeZone.getTimeZone("Europe/Brussels"));
cal.setTime(date);
return cal;
CalendartimestampToCalendar(String timestamp)
timestamp To Calendar 
GregorianCalendar calendar = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
int year = Integer.parseInt(timestamp.substring(0, 4));
int month = Integer.parseInt(timestamp.substring(4, 6)) - 1; 
int day = Integer.parseInt(timestamp.substring(6, 8));
int hour = Integer.parseInt(timestamp.substring(8, 10));
int minute = Integer.parseInt(timestamp.substring(10, 12));
int second = Integer.parseInt(timestamp.substring(12, 14));
calendar.set(year, month, day, hour, minute, second);
...
CalendartoDefaultTimeZone(Calendar calendar)
to Default Time Zone 
Calendar c = Calendar.getInstance();
c.setTimeInMillis(calendar.getTimeInMillis());
return c;
StringtoTimeStamp(Calendar cal)
Converts a Calendar object into a timestamp string in ISO 8601 format. 
if (cal == null) {
    cal = Calendar.getInstance();
StringBuilder sb = new StringBuilder();
sb.append(String.format("%04d", cal.get(Calendar.YEAR)));
sb.append('-').append(String.format("%02d", cal.get(Calendar.MONTH) + 1));
sb.append('-').append(String.format("%02d", cal.get(Calendar.DAY_OF_MONTH)));
sb.append('T').append(String.format("%02d", cal.get(Calendar.HOUR_OF_DAY)));
...
StringtoTimeString(final Calendar calendar)
Show the Time value of a Calendar as a String. 
String strHour;
String strMinute;
String strSecond;
strHour = "";
strMinute = "";
strSecond = "";
if (calendar != null) {
    if (calendar.get(Calendar.HOUR_OF_DAY) < 10) {
...