SimpleDateFormat Parsing Time and Date wrong minutes and seconds

Question

Can anyone explain to me what\'s wrong in this code:

System.out.println(new SimpleDateFormat(\"yyyy-MM-dd\'T\'HH:mm:ss.sss\'Z\'\").parse(\"2015-04-22T19:54:1         


        

Answer 1

For SimpleDateFormat, the milliseconds format value contains capital S characters, not lowercase s characters for seconds.

s Second in minute Number 55

S Millisecond Number 978

It's interpreting 827 as seconds, and adds those seconds (847 seconds is 13 minutes, 47 seconds) to your value.

Use SSS for milliseconds.

new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")

As an aside, you don't need to re-create your SimpleDateFormat more than once if it's the same. You can create it once, save it to a variable, and call parse multiple times, once for each date/time string you wish to parse.

Answer 2

Use capital SSS instead of sss, as s is interpreted as seconds in SimpleDateFormat. So change your code to

System.out.println(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").parse("2015-04-22T19:54:11.827Z"));

System.out.println(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").parse("2015-04-22T19:54:11.0Z"));

This shall do the job for you. And in order to optimize your code use this

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
System.out.println(sdf.parse("2015-04-22T19:54:11.827Z"));

System.out.println(sdf.parse("2015-04-22T19:54:11.0Z"));

No need to create objects again and again. Just create once and use that to parse.