I want this method to convert and get value in miliseconds

Question

How can I do that? I tried a lot but it is not working properly.

public static String getDateTime() {
        String dateStr = "";
        Calendar cal = Calendar.getInstance();
        Date date = cal.getTime();
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        dateStr = dateFormat.format(date);
        return dateStr;
    }

Please someone right another method which return miliseconds from above Date format. Of course! In my DB I'm storing this value: 2019-04-17 17:11:02 -> I want this value to convert in miliseconds using one method. so that I call new method and pass that variable value.

do you have date in string above format when you get from database and want to covert it back to Date object and milliseconds? is this what you want? — Asad Ali Choudhry, Apr 13 '19 at 11:52
when I get back that String value from DB, I want that value to convert and stroe in long variable as a miliseconds — Pooja Singh, Apr 13 '19 at 12:16
@Mr.AF when I get back that String value from DB, I want that value to convert and stroe in long variable as a miliseconds – — Pooja Singh, Apr 13 '19 at 12:17
@luk2302 when I get back that String value from DB, I want that value to convert and stroe in long variable as a miliseconds – — Pooja Singh, Apr 13 '19 at 12:17
Look at my answer, its returning you milliseconds in long variable. — Asad Ali Choudhry, Apr 13 '19 at 12:31
As an aside consider throwing away the long outmoded and notoriously troublesome `SimpleDateFormat` and friends, and adding [ThreeTenABP](https://github.com/JakeWharton/ThreeTenABP) to your Android project in order to use `java.time`, the modern Java date and time API. It is so much nicer to work with. — Ole V.V., Apr 13 '19 at 12:48

Sandeep Malik · Answer 1 · 2019-04-13T12:27:55.880

1

try this:-

       long timeInMilliseconds = 0;
        String givenDateString = "2019-04-17 17:11:02";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            Date mDate = sdf.parse(givenDateString);
            timeInMilliseconds = mDate.getTime();
        } catch (ParseException e) {
                    e.printStackTrace();
        }

String timeInMilliseconds = String.valueOf(timeInMilliseconds);

edited Apr 13 '19 at 12:27

answered Apr 13 '19 at 11:53

Sandeep Malik

1,972
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leave a comment if any query – Sandeep Malik Apr 13 '19 at 11:53
I want to store in value in miliseconds – Pooja Singh Apr 13 '19 at 12:15
milliseconds is always store in long type. – Sandeep Malik Apr 13 '19 at 12:19
If this answer is usefull for you then appreciate the answer..... – Sandeep Malik Apr 13 '19 at 15:09

score 1 · Accepted Answer · answered Apr 13 '19 at 11:57

1

 public static long milisecondsFromDate(String dateStr) {

    SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    try {
        Date date = formatter.parse(dateStr);
        return date.getTime();
    } catch (Exception e) {
        Log.e("Tag", "Wrong date Format");
    }
    return -1;
}

answered Apr 13 '19 at 11:57

Asad Ali Choudhry

4,985
4
31
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I want to store in value in miliseconds – Pooja Singh Apr 13 '19 at 12:15
this above method already returning you milliseconds. Are you facing any issue in it, let me know. – Asad Ali Choudhry Apr 13 '19 at 12:30

score 1 · Answer 3 · answered Apr 13 '19 at 12:17

I would strongly suggest to use Java8 Date/Time API for your cause, something like:

public static void main(String[] args) {
    System.out.println(getDateTime());
}

public static String getDateTime() {
    String dateStr = "2019-04-17 17:11:02";
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss", Locale.ENGLISH);
    LocalDateTime localDateTime = LocalDateTime.parse(dateStr, formatter);

    return String.valueOf(localDateTime.toInstant(ZoneOffset.UTC).getEpochSecond());
}

I want this method to convert and get value in miliseconds

3 Answers3