ДЦ>>   Date d1;
ДЦ>>   Date d2;
ДЦ>>   System.out.println(d1.getTime() - d2.getTime());
ДЦ>>

 Date d1;
 Date d2;
 long delta = d1.getTime() - d2.getTime();
 long days = delta / 1000 / 60 / 60 /24;
 delta = delta - days;
 long hours = delta / 1000 / 60 / 60;
 delta = delta - hours; 
 long minutes = delta / 1000 / 60;
 delta = delta - minutes;
 long sec = delta / 1000;
 long mces = delta - sec;
 System.out.println ( "delta = " +  days + " дн " + hours + " ч " + minutes + " мин " + sec + " сек " + msec + " мс" );

Joda-Time 1.2 - Replacing JDK Date and Calendar

Joda-Time 1.2 has been released. Joda-Time provides a Java library for date and time handling including the ISO8601 standard. It completely replaces the JDK Date and Calendar classes, while still providing good integration. This release fixes some minor bugs in v1.1 and adds two new calendars as well as some useful new methods on existing classes. It is open-source software under the ASF2 license.

This release fixes a number of minor bugs in v1.1. There are also some new features:

    * Islamic calendar system
    * Ethiopic calendar system
    * YearMonthDay/TimeOfDay factory methods to ensure exact field by field creation from Date/Calendar
    * simpler conversion of a month/week etc to an interval - dt.monthOfYear().toInterval()
    * convenient method for getting last day of month - dt.monthOfYear().withMaximumValue()


Release notes: http://sourceforge.net/project/shownotes.php?release_id=379940&group_id=97367
Download: http://sourceforge.net/project/showfiles.php?group_id=97367&package_id=104212

Hibernate and JSP integration are available from linked websites.

Major features of Joda-Time
---------------------------

    * Easy to Use - Calendar makes accessing 'normal' dates difficult, due to the lack of simple methods. Joda-Time has straightforward field accessors. And the index of January is 1!
    * Extensible - Joda-Time supports multiple calendar systems via a plugin mechanism, which is much more extensible than the subclasses of Calendar. Currently supported calendars are ISO8601, GregorianJulian, Buddhist (Thai), Coptic, Ethiopic and Islamic.
    * Comprehensive - Joda-Time includes classes for datetimes, dates without times, times without dates, intervals and time periods.
    * Advanced formatting - An advanced and extensible formatting mechanism is included, allowing input and output to string in a thread-safe manner.
    * Well documented. There is documentation in the form of a quick and full user guide, plus reference pages, FAQs and javadoc.
    * Tested. There is good test coverage, see the website, providing an assurance of quality.

    DateTime d1 = DateTime.Now;
    Thread.Sleep(1212);
    DateTime d2 = DateTime.Now;
    TimeSpan d = d2-d1;
    Console.WriteLine("delta = " + d.Days + " дн " + d.Hours + " ч " + d.Minutes + " мин " + d.Seconds + " сек " + d.Milliseconds + " мс");