getting current time in groovy/java

Question

I have the following code in groovy to get current time in hours.

def now = new Date()
  def time = now.getHours()

but the getHour() method is deprecated. What are the disadvantages if I use this method and the what is the alternative to this method in groovy/Java ?

It tells you what to use [in the documentation](http://docs.oracle.com/javase/7/docs/api/java/util/Date.html#getHours%28%29) — tim_yates, Dec 10 '13 at 06:50
possible duplicate of [Java: getMinutes and getHours](http://stackoverflow.com/questions/907170/java-getminutes-and-gethours) — tim_yates, Dec 10 '13 at 06:52
Also http://stackoverflow.com/questions/8150155/java-gethours-getminutes-and-getseconds and http://stackoverflow.com/questions/13343524/the-correct-way-to-set-and-get-hour-minutes-sec — tim_yates, Dec 10 '13 at 06:55
actually I want to know the disadvantages of using deprecated methods. the only one I know is that latter version of jre will not include them, are there any other disadvantages ? — Sikander, Dec 10 '13 at 06:58
It was deprecated for a reason. Usually thread safety, poor design, or just not working correctly. http://stackoverflow.com/questions/2901262/why-were-most-java-util-date-methods-deprecated — tim_yates, Dec 10 '13 at 07:02
@sikander I can tell you from experience that those methods in `java.util.Date` have been deprecated for over 10 years now. I wouldn't be too concerned about them actually being removed. I think they are deprecated because the entire Date class' design ignores all timezone considerations. — dsh, Aug 26 '16 at 15:44

score 9 · Accepted Answer · answered Dec 10 '13 at 06:06

9

Use Calendar,

  Calendar cal=Calendar.getInstance();//it return same time as new Date()
  def hour = cal.get(Calendar.HOUR_OF_DAY)

For details, read this docs.

answered Dec 10 '13 at 06:06

Masudul

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score 9 · Answer 2 · edited Apr 19 '17 at 08:36

Try using Joda Time instead of standard java.util.Date classes. Joda Time library has much better API for handling dates.

DateTime dt = new DateTime();  // current time
int month = dt.getMonth();     // gets the current month
int hours = dt.getHourOfDay(); // gets hour of day

You can use the traditional classes like this to fetch fields from given Date instance.

Date date = new Date();   // given date
Calendar calendar = GregorianCalendar.getInstance(); // creates a new calendar instance
calendar.setTime(date);   // assigns calendar to given date 
calendar.get(Calendar.HOUR_OF_DAY); // gets hour in 24h format
calendar.get(Calendar.HOUR);        // gets hour in 12h format
calendar.get(Calendar.MONTH);       // gets month number, NOTE this is zero based!

score -3 · Answer 3 · answered Dec 10 '13 at 06:35

-3

You can use Joda-time for get current time or getHours

answered Dec 10 '13 at 06:35

Muhamamd Omar Muneer

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getting current time in groovy/java

3 Answers3