Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #18569

Re: Date/Calendar confusion

Show all headers | View raw

Try this:


package snippet;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Snippet {
	public static void main(String[] args) throws ParseException {
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS"); 
        TimeZone timeZone = TimeZone.getTimeZone("GMT"); 
        timeZone.setRawOffset(0); // get GMT time zone for sure 
        dateFormat.setTimeZone(timeZone); 

        Calendar calendar1 = Calendar.getInstance(timeZone, Locale.US); 
        Date date1 = dateFormat.parse("1970-01-01T00:00:00.000"); 
        System.out.println(date1);
        calendar1.setTime(date1); 
        System.out.println(calendar1.getTimeInMillis()); // is 0 
        System.out.println(calendar1);

        Calendar calendar2 = Calendar.getInstance(timeZone, Locale.US); 
        Date date2 = dateFormat.parse("0001-01-01T00:00:00.000");
        System.out.println(date2);
        calendar2.setTime(date2); 

        // adjust for the epoch 01.01.1970 
        // 
        calendar2.set(Calendar.YEAR, calendar2.get(Calendar.YEAR) + 1969); 
        calendar2.set(Calendar.MONTH, calendar2.get(Calendar.MONTH)); 
        calendar2.set(Calendar.DAY_OF_MONTH, calendar2.get(Calendar.DAY_OF_MONTH)); 
        System.out.println(calendar2);

        System.out.println(calendar2.getTimeInMillis()); // should be 0 but is -124335907200000 
		
	}
}

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Date/Calendar confusion Ulrich Scholz <d7@thispla.net> - 2012-09-06 01:03 -0700
  Re: Date/Calendar confusion nogales <nogales.manuel@gmail.com> - 2012-09-06 02:29 -0700
  Re: Date/Calendar confusion Lew <lewbloch@gmail.com> - 2012-09-06 10:21 -0700
  Re: Date/Calendar confusion "John B. Matthews" <nospam@nospam.invalid> - 2012-09-06 20:53 -0400
    Re: Date/Calendar confusion Lew <lewbloch@gmail.com> - 2012-09-07 11:01 -0700
      Re: Date/Calendar confusion "John B. Matthews" <nospam@nospam.invalid> - 2012-09-07 21:02 -0400
        Re: Date/Calendar confusion Lew <lewbloch@gmail.com> - 2012-09-07 18:44 -0700
          Re: Date/Calendar confusion "John B. Matthews" <nospam@nospam.invalid> - 2012-09-08 09:12 -0400
            Re: Date/Calendar confusion Lew <lewbloch@gmail.com> - 2012-09-08 16:51 -0700

csiph-web