How can I reformat date and time?

Question

How can I convert 24 hours time format into 12 hours format? I know this question has been asked many times, but my problem is different. My current time is:

Tue Nov 07 18:44:47 GMT+05:00 2017

I just want 6:44 pm from my date time. I tried this:

private void convertTime(String time)
{
    try {
        final SimpleDateFormat sdf = new SimpleDateFormat("H:mm");
        final Date dateObj = sdf.parse(time);
        System.out.println(dateObj);
        System.out.println(new SimpleDateFormat("K:mm a").format(dateObj));
    } catch (final ParseException e) {
        e.printStackTrace();
    }
}

How is your problem different? In what way does your attempt fail? Please quote any error messages and any stacktrace verbatim. — Ole V.V., Nov 19 '17 at 17:56
@Ole When I was posting this question I was not aware about my problem and I think that it is different from the problem that i asked earlier but after getting suitable answer i got to know that this is not different than the questions which have been asked earlier — Innocent, Jul 13 '18 at 13:12

Cătălin Florescu · Answer 1 · 2017-11-07T08:44:49.573

3

final SimpleDateFormat sdf = new SimpleDateFormat("hh:mm");

Using hh will give you 12 hours format and HH 24 hour format. More details on documentation.

Edit:

Your initial format must be the following in order to parse your date string to a Date object:

final SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM d HH:mm:ss 'GMT'Z yyyy");
final Date dateObj = sdf.parse(time);

After that you can format time to your needs.

edited Nov 07 '17 at 08:44

answered Nov 07 '17 at 08:31

Cătălin Florescu

5,012
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but i have this time Tue Nov 07 18:44:47 GMT+05:00 2017 and i need only hours and minutes with 12 hours format – Innocent Nov 07 '17 at 08:37

pleft · Accepted Answer · 2017-11-07T08:47:30.893

2

From SimpleDateFormat documentation:

"h:mm a": 12:08 PM

So the format you need for:

I just want 6:44 pm from my date time

is:

final SimpleDateFormat sdf1 = new SimpleDateFormat("EEE MMM d HH:mm:ss z yyyy");
Date date = sdf1.parse(time);
final SimpleDateFormat sdf = new SimpleDateFormat("h:mm a");
String newDateString = sdf.format(date);

edited Nov 07 '17 at 08:47

answered Nov 07 '17 at 08:34

pleft

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2
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but i have this time in string "Tue Nov 07 18:44:47 GMT+05:00 2017" and I need only hours and minutes with 12 hours format – Innocent Nov 07 '17 at 08:40
Ok updated my answer, `time` is the `String time` parameter of your `convertTime` method – pleft Nov 07 '17 at 08:48

score 1 · Answer 3 · answered Nov 07 '17 at 08:32

try {
    final SimpleDateFormat sdf = new SimpleDateFormat("hh:mm");
    final Date dateObj = sdf.parse(time);
    System.out.println(dateObj);
    System.out.println(new SimpleDateFormat("K:mm a").format(dateObj));
} catch (final ParseException e) {
    e.printStackTrace();
}

How can I reformat date and time?

3 Answers3