Adding 1 hour to java.util.Calendar object(31-DEC-2015 23:00:00) gives 01-JAN-2015 00:00:00 2015

Question

This is my Java code

Calendar c = Calendar.getInstance(TimeZone.getTimeZone("GMT"));

c.set(Calendar.YEAR, 2015);
c.set(Calendar.MONTH, 11);
c.set(Calendar.DAY_OF_MONTH, 31);
c.set(Calendar.HOUR_OF_DAY, 22);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);

SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-YYYY HH:mm:ss");
System.out.println("date  is : "+sdf.format(c.getTime()));

c.add(Calendar.HOUR_OF_DAY, 1);

System.out.println("date2  is : "+sdf.format(c.getTime()));

and here is the output

date  is : 31-Dec-2015 23:00:00
date2  is : 01-Jan-2015 00:00:00

Why is the year not changing to 2016 in the 2nd print statement?

Your code doesn't fit the output. It returns "date is : 31-Dec-2015 22:00:00" and "date2 is : 31-Dec-2015 23:00:00" — Felix D., Dec 08 '15 at 08:41

score 1 · Accepted Answer · edited Dec 08 '15 at 08:20

1

I tried your code and it is working as you need, but you should change the format to

dd-MMM-yyyy HH:mm:ss

edited Dec 08 '15 at 08:20

teobais

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answered Dec 08 '15 at 08:19

ΦXocę 웃 Пepeúpa ツ

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Thanks a lot! that helps – Syed Faisal Dec 08 '15 at 11:26

Adding 1 hour to java.util.Calendar object(31-DEC-2015 23:00:00) gives 01-JAN-2015 00:00:00 2015

1 Answers1