Simple date format reading month incorrectly

Question

I am working with converting Date Strings to Epoch times then back again, but it seems like when I convert to Epoch the month is ignored when I parse the date String

String timeString = "15 Aug 2005 13:07:58.035";
Date dateTime = null;
SimpleDateFormat sdf = new SimpleDateFormat("DD MMM yyyy hh:mm:ss", Locale.US);
try {
    dateTime = sdf.parse(timeString);
} catch (ParseException e) {
    e.printStackTrace();
}
long convert = dateTime.getTime();
System.out.println(str);
System.out.println(convert);
Date epochToString = new Date(convert);
System.out.println(epochToString.toString());

Here is the output

15 Aug 2005 13:07:58.035
1105812478000
Sat Jan 15 13:07:58 EST 2005

When I calculated the epoch time by hand the date was indeed Jan 15 2005, so for some reason the MMM value is being ignored in my format.

Edit: I should also note that I changed the format token to MM and tried a numerical representation in the string instead, but had the same exact results.

Peter Lawrey · Accepted Answer · 2015-12-21T02:11:33.853

1

This is because DD means day in year. You want dd for day in month. See SimpleDateFormat Javadoc

I suggest you use HH for 24 hour time.

edited Dec 21 '15 at 02:11

answered Dec 21 '15 at 02:00

Peter Lawrey

525,659
79
751
1,130

This isn't correct, I am using mm for minutes in the second half of my string, and the javadoc does actually say MMM is the token for months, thanks though. – pianoisland Dec 21 '15 at 02:05
1

@pianoisland you are right, fixed my answer. – Peter Lawrey Dec 21 '15 at 02:11

Simple date format reading month incorrectly

1 Answers1