javaandroidandroid-date

How to convert date to milliseconds with out timezone offset?

I what to convert selected date to milliseconds without timezone difference. Below is my code.

 String selectedDate=Jan 18, 2020;
 SimpleDateFormat format = new SimpleDateFormat("MMM dd, yyyy", Locale.US);
 Date date = format.parse(selectedDate);

while running I am getting date like Sat Jan 18 00:00:00 GMT+05:30 2020. But I want without timezone difference like Jan 18, 2020.

Solution

  • For a difference of 0 from UTC:

        DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("MMM dd, uuuu", Locale.ENGLISH);
    String selectedDate = "Jan 18, 2020";
    ZonedDateTime zdt = LocalDate.parse(selectedDate, dateFormatter)
            .atStartOfDay(ZoneOffset.UTC);
    System.out.println(zdt);
    long millisSinceEpoch = zdt.toInstant().toEpochMilli();
    System.out.println(millisSinceEpoch);

    Output from this snpipet is:

    2020-01-18T00:00Z
1579305600000

    I am using java.time, the modern Java date and time API. The classes that you used, SimpleDateFormat and Date, are poorly designed and long outdated, and no one should use them anymore.

    Question: Doesn’t java.time require Android API level 26?

    java.time works nicely on both older and newer Android devices. It just requires at least Java 6.

    Links