Enter year: 2016 Enter month: 12 Enter day: 31 Enter next N days: 5 December has as many days as 31 days Today's date: December 31st 2016 Tomorrow's date: January 01, 2017 After 5 days: January 05, 2017. Note: The function, ordinal has been copied from this answer. Share. The Java Date class keeps track of those milliseconds as a long value. Because long is a signed number, Some useful constants for the fields are DATE, MONTH, YEAR, and WEEK_OF_YEAR. I am working on a piece of work where I need to get year, month, day from a String in Java. The string is like that: 20170119T163048. Where 2017 is year, 01 is month, 19 is day, 16:30:48 is time. public void convertStringToDate (String string) { String dateInString = ""; SimpleDateFormat formatter = new SimpleDateFormat (); Date date One of the core classes of the Date-Time API is the Instant class, which represents the start of a nanosecond on the timeline. This class is useful for generating a time stamp to represent machine time. import java.time.Instant; Instant timestamp = Instant.now (); A value returned from the Instant class counts time beginning from the first 16. May I know what is the most efficient way to construct a date object using a specific day, month, and year. Date (int year, int month, int day) This construct is depreciated. Hence, what I usually do is: Calendar calendar = Calendar.getInstance (); Date date = calendar.set (year, month, date).getTime (); However, my understanding is that wjkU.

java day of year