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javadatedatepickerdatetime-formatepoch
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Reputation: 707

How to format long (milliseconds) as dd-MMM-yyyy hh:mm:ss:aa?

I can get the output as Wed May 11 15:36:08 IST 2016, but how do I convert the date to a string with the required format?

Required format is: 12-05-2016 16:05:08 pm

What I tried is,

public class Test {
    public static void main(String args[]) throws ParseException{
        String epoche="1462961108000";
        Long initialLogTime = Long.valueOf(epoche);
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(initialLogTime);
        Calendar fromDateTime = calendar;
        Calendar toDateTime = fromDateTime;
        toDateTime.add(Calendar.MINUTE, 30);
        SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MMM-yyyy hh:mm:ss:aa");
        String datestring = String.valueOf(fromDateTime.getTime());
        String datestring1 = String.valueOf(toDateTime.getTime());
        System.out.println(datestring); //here output is Wed May 11 15:36:08 IST 2016
        System.out.println(datestring1); // here output is Wed May 11 15:36:08 IST 2016
        Date dates = dateFormat.parse(datestring);
        Date date1s = dateFormat.parse(datestring1);
        System.out.println(dates);
        System.out.println(date1s);
    }
}

The error I am getting is: 

Exception in thread "main" java.text.ParseException: Unparseable date: "Wed May 11 16:05:08 IST 2016"
at java.text.DateFormat.parse(DateFormat.java:357)
at test.Test.main(Test.java:27)

Upvotes: 5

Views: 41613

Answers (5)

Arvind Kumar Avinash
Arvind Kumar Avinash

Reputation: 79540

java.time

In March 2014, Java 8 introduced the modern, java.time date-time API which supplanted the error-prone legacy java.util date-time API. Any new code should use the java.time API.

Solution using modern date-time API

  1. Convert the epoch milliseconds into an Instant using Instant#ofEpochMilli.
  2. Convert the obtained Instant into a ZonedDateTime using the required ZoneId.
  3. Use ZonedDateTime#plusMinutes to add minutes to the obtained ZonedDateTime.
  4. Format the result using a DateTimeFormatter with the required pattern. Normally am/pm marker makes sense with clock-hour-of-am-pm (1-12). The symbol for clock-hour-of-am-pm (1-12) is h instead of H, which is used for hour-of-day (0-23). Nevertheless, you can display the am/pm marker with an hour-of-day (0-23) using a in the pattern. Check documentation to learn more about these symbols.

Demo:

public class Main {
    public static void main(String[] args) {
        String epoche = "1462961108000";
        Instant instant = Instant.ofEpochMilli(Long.valueOf(epoche));

        // Replace ZoneId.of("Asia/Kolkata") as required e.g.
        // to ZoneId.systemDefault() if your requirement is to
        // get the date-time in your JVM's time zone
        ZonedDateTime zdt = instant.atZone(ZoneId.of("Asia/Kolkata"))
                                   .plusMinutes(30);

        String dateString = zdt.format(
                DateTimeFormatter.ofPattern("dd-MM-uuuu HH:mm:ss a", Locale.UK));
        System.out.println(dateString);
    }
}

Output:

11-05-2016 16:05:08 pm

Online Demo

Learn more about the modern Date-Time API from Trail: Date Time.

Upvotes: 2

Digvijay Machale
Digvijay Machale

Reputation: 599

In Android, Pass String Like 11/10/2017 11:16:46 to function ConvertDateTime

   public String ConvertUpdate(String strDate) {

    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
    try {
        Date d = simpleDateFormat.parse(strDate);
        simpleDateFormat = new SimpleDateFormat("dd MMM yy hh:mm a");

        return simpleDateFormat.format(d);
    } catch (ParseException e) {
        e.printStackTrace();
    }
    return null;
}

output 10 Nov 17 11:16 AM

Upvotes: 0

Sanjeev
Sanjeev

Reputation: 9946

You need to format your dates accordingly. This shall help you

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss:aa");
    System.out.println(dateFormat.format(fromDateTime.getTime()));
    System.out.println(dateFormat.format(toDateTime.getTime()));

Upvotes: 9

Ankur Singhal
Ankur Singhal

Reputation: 26077

Please try this

public static void main(String[] args) {
        String epoche = "1462961108000";
        Date date = new Date(Long.parseLong(epoche));
        DateFormat  sdf = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss:aa");
        String strDate = sdf.format(date);
        System.out.println(strDate);
    }

Output

11-05-2016 15:35:08:PM

Upvotes: 0

sotondolphin
sotondolphin

Reputation: 223

if you are using java 8, you can use

LocalDate date = LocalDate.now();

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MMM-yyyy HH:mm:ss:aa");

System.out.println(date.format(formatter));

Upvotes: 0

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