How to get current date time by Ucalendar

How to get current date time by Ucalendar

BY 22 Jan 2016 Native Code Snippet
This sample code describes how to get system date time (example: year/month/day/hour, etc.) by use the Ucalendar API. Also, you can manipulate the data time instance (such as: add or minus days/months, etc.) via the Ucalendar API.
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