System.out.print("Updated time: ");
System.out.print(calendar.get(Calendar.HOUR) + ":");
System.out.print(calendar.get(Calendar.MINUTE) + ":");
System.out.println(calendar.get(Calendar.SECOND));
}
}
Sample output is shown here:
Date: Jan 1 2007
Time: 11:24:25
Updated time: 10:29:22
GregorianCalendar
GregorianCalendar is a concrete implementation of a Calendar that implements the normal
Gregorian calendar with which you are familiar. The getInstance( ) method of Calendar
will typically return a GregorianCalendar initialized with the current date and time in the
default locale and time zone.
GregorianCalendar defines two fields: AD and BC. These represent the two eras defined
by the Gregorian calendar.
There are also several constructors for GregorianCalendar objects. The default,
GregorianCalendar( ), initializes the object with the current date and time in the default
locale and time zone. Three more constructors offer increasing levels of specificity:
GregorianCalendar(int year, int month, int dayOfMonth)
GregorianCalendar(int year, int month, int dayOfMonth, int hours,
int minutes)
GregorianCalendar(int year, int month, int dayOfMonth, int hours,
int minutes, int seconds)
All three versions set the day, month, and year. Here, year specifies the year. The month
is specified by month, with zero indicating January. The day of the month is specified by
dayOfMonth. The first version sets the time to midnight. The second version also sets the
hours and the minutes. The third version adds seconds.
You can also construct a GregorianCalendar object by specifying the locale and/or time
zone. The following constructors create objects initialized with the current date and time
using the specified time zone and/or locale:
GregorianCalendar(Locale locale)
GregorianCalendar(TimeZone timeZone)
GregorianCalendar(TimeZone timeZone, Locale locale)
GregorianCalendar provides an implementation of all the abstract methods in Calendar.
It also provides some additional methods. Perhaps the most interesting is isLeapYear( ), which
tests if the year is a leap year. Its form is
boolean isLeapYear(int year)
This method returns true if year is a leap year and false otherwise.
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