How to convert a string Date to long millseconds

Question

I have a date inside a string  something like  12-December-2012   How can I convert this into milliseconds  long

User · Answer

Try below code          SimpleDateFormat f   new SimpleDateFormat  your string format   Locale getDefault             Date d   null          try               d   f parse date             catch  ParseException e                e printStackTrace                      long timeInMillis   d getTime

User · Answer

Using SimpleDateFormat  String string date    12-December-2012    SimpleDateFormat f   new SimpleDateFormat  dd-MMM-yyyy    try       Date d   f parse string date       long milliseconds   d getTime      catch  ParseException e        e printStackTrace

User · Answer

you can use the simpleDateFormat to parse the string date

User · Answer

SimpleDateFormat formatter   new SimpleDateFormat  dd-MMM-yyyy    Date date    Date formatter parse  12-December-2012    long mills   date getTime

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It   s about time someone provides the modern answer to this question  In 2012 when the question was asked  the answers also posted back then were good answers  Why the answers posted in 2016 also use the then long outdated classes SimpleDateFormat and Date is a bit more of a mystery to me  java time  the modern Java date and time API also known as JSR-310  is so much nicer to work with  You can use it on Android through the ThreeTenABP  see this question  How to use ThreeTenABP in Android Project   For most purposes I recommend using the milliseconds since the epoch at the start of the day in UTC  To obtain these       DateTimeFormatter dateFormatter               DateTimeFormatter ofPattern  d-MMMM-uuuu   Locale ENGLISH       String stringDate    12-December-2012       long millisecondsSinceEpoch   LocalDate parse stringDate  dateFormatter               atStartOfDay ZoneOffset UTC               toInstant                toEpochMilli        System out println millisecondsSinceEpoch     This prints   1355270400000   If you require the time at start of day in some specific time zone  specify that time zone instead of UTC  for example                atStartOfDay ZoneId of  Asia Karachi      As expected this gives a slightly different result   1355252400000   Another point to note  remember to supply a locale to your DateTimeFormatter  I took December to be English  there are other languages where that month is called the same  so please choose the proper locale yourself  If you didn   t provide a locale  the formatter would use the JVM   s locale setting  which may work in many cases  and then unexpectedly fail one day when you run your app on a device with a different locale setting

User · Answer

Take a look to SimpleDateFormat class that can parse a String and return a Date and the getTime method of Date class

User · Answer

using simpledateformat you can easily achieve it   1  First convert string to java Date using simpledateformatter   2  Use getTime method to obtain count of millisecs from date   public class test         public static void main String   args          String currentDate    01-March-2016         SimpleDateFormat f   new SimpleDateFormat  dd-MMM-yyyy         Date parseDate   f parse currentDate        long milliseconds   parseDate getTime                    more Example click here

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Easiest way is used the Date Using Date    and  getTime          Date dte new Date        long milliSeconds   dte getTime        String strLong   Long toString milliSeconds       System out println milliSeconds

User · Answer

First convert string to java util Date using date formatter Use getTime   to obtain count of millisecs from date

[java] How to convert a string Date to long millseconds

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