Oracle tutorial: Date Time explaining how to use java.time. I frankly find the modern API so much nicer to work with. The first two are particularly troublesome.
While the other answers are generally correct, the classes DateFormat, SimpleDateFormat, Date and Calendar used there are poorly designed and long outdated. GMT Time formatted for user: Nov 1, 2015, 6:00:00 AM This also gives us a different GMT time: GMT Time: T06:00Z We notice that the hour of day is still 01:00, but the offset is now -05:00 instead of -04:00. ("Alternate time in New York: " + nyTime) Īlternate time in New York: T01:00-05:00 So to get the standard time interpretation: nyTime = nyTime.withLaterOffsetAtOverlap() You may control which result you get using withEarlierOffsetAtOverlap() or withLaterOffsetAtOverlap(). There is no way that I can tell you which of them is correct in your case. It could be in Eastern Daylight Time, equal to 05:00 GMT, or it could be in Eastern Standard Time, one hour later, hence equal to 06:00 GMT. So when we have got 01:00:00 as input, it is ambiguous. I understand that you ask because both are valid answers. GMT Time formatted for user: Nov 1, 2015, 5:00:00 AMīetween the two results below, which one should you take? ("GMT Time formatted for user: " + formattedDateTime) String formattedDateTime = gmtTime.format(userFormatter) = DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM) Here’s an example of formatting for an American audience: DateTimeFormatter userFormatter If you need to give string output, format using a date-time formatter. To convert to GMT: OffsetDateTime gmtTime = nyTime.toOffsetDateTime() Output from this snippet is: Time in New York: T01:00-04:00 ZonedDateTime nyTime = LocalDateTime.parse(input, formatter) = DateTimeFormatter.ofPattern("uuuu-MM-dd HH:mm:ss") Second message, use java.time, the modern Java date and time API, for your date and time work. In those cases parse into a proper date-time object first thing. It may be from a text file, from the user or from data exchange with another system, for example. Sometimes we get date and time as string input. Just as you don’t handle numbers and Boolean values as strings (I hope).
("The date and time in :: "+ obj.getDisplayName() + "is ::" + theResult) įirst message, don’t handle your date and time as strings in your code. ("The current time in India is :: " +currentdate.getTime()) (formatter.parse(strdate)) ĭate theResult = formatter.parse(strdate) TimeZone obj = TimeZone.getTimeZone("CST") Strdate = formatter.format(currentdate.getTime())
New york to tokyo time converter code#
The code is :: package MyPackage Ĭalendar currentdate = Calendar.getInstance() ĭateFormat formatter = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss") The date and time in :: Central Standard Time is :: Sat Feb 25 03:39:Īnd the actual Time according to CST time zone is :: Friday, 24 February 4:39:16 a.m(GMT - 6:00) The current time in India is :: Fri Feb 24 16:09: Like if i execute my program at a particular time. I am not getting any error but i am not getting my output as expected. I have written this code to convert the current system date and time to some other timezone.
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