java - How to set a BCE year using GregorianCalendar -


I have an assignment that changes the date from one calendar system to another.

The document for Gregorian calendar is to suggest that you can use dates with BCE years, but I do not know how if I only made years negative Given, i.e. 

  Gregorian calendar calories = new Gregorian calendars (-20, 1, 2, 3, 0, 0); Println (cal.getTime.toString ());

This 'sun is printed Feb 02 03:00 GMT-05: 00 21', which is clearly not correct.

You have to set ERA in BC (BC is a static field).

Standard (Gregorian) Calendar 2 Era, BC and Eddie.

For example 

  calendar.set (calendar.ara, gregorian calendar.bc);

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