time conversion in java for 12:00 noon

Question

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class ConvertDatesBetweenFormatsWithSimpleDateFormat {
public static void main(String[] args) {
    try {
     String dateStr = "12:30";

        DateFormat srcDf = new SimpleDateFormat("hh:mm");
        Date date = srcDf.parse(dateStr);
        DateFormat destDf = new SimpleDateFormat("HH:mm:ss");
         dateStr = destDf.format(date);
        System.out.println("Converted date is : " + dateStr);
    }
    catch (ParseException e) {
        e.printStackTrace();
    }
}
}

I am trying to convert date format from hh:mm to HH:mm:ss. While this code is working fine for all the time, its not givig the required result for time between 12-1. Eg: for 12:30 its giving 00:30(it should be 12:30 instead), while for 1:30 it is giving as 13:30. What changes should be done in this case?

Possible duplicate of [Display current time in 12 hour format with AM/PM](http://stackoverflow.com/questions/18734452/display-current-time-in-12-hour-format-with-am-pm) — Unknown, Aug 09 '16 at 10:11

score 0 · Answer 1 · answered Aug 09 '16 at 10:14

0

You need to add the AM PM marker in the parser

 DateFormat srcDf = new SimpleDateFormat("hh:mm a");

And specify the AM PM in the given date string

 String dateStr = "12:30 PM";

Otherwise java can't simply know if hte hour is AM or PM.

answered Aug 09 '16 at 10:14

Hooch

487
3
11

score 0 · Answer 2 · answered Aug 09 '16 at 10:18

0

SimpleDateFormat simply does parsing on the input String. It doesn't do any implicit conversion. Its like populating Date object fields with parsed values of input String.

Refer below link for possible Date patterns http://beginnersbook.com/2014/01/how-to-convert-string-to-24-hour-date-time-format-in-java/

answered Aug 09 '16 at 10:18

Rohit Sakla

1

In addition to any link, you should describe all important notes from the link. – Alex M Aug 09 '16 at 10:37
Sure , Let me know if you need any inputs – Rohit Sakla Sep 19 '16 at 20:16

score 0 · Accepted Answer · answered Aug 09 '16 at 10:38

0

In case you want second also then use below code but second is not getting from given format that's why it will be alway 00.

Result:- Converted date is : 12:30:00 AM

DateFormat destDf = new SimpleDateFormat("hh:mm:ss a");

answered Aug 09 '16 at 10:38

Lokesh Kumar Gaurav

726
1
8
24

time conversion in java for 12:00 noon

3 Answers3