Convert java time LocalDate into java util Date type

Question

I want to convert java time LocalDate into java util Date type  Because I want to set the date into JDateChooser  Or is there any date chooser that supports java time dates

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LocalDate date   LocalDate now        DateFormat formatter   new SimpleDateFormat  quot dd-mm-yyyy quot        try           Date utilDate  formatter parse date toString           catch  ParseException e               handle exception

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Here s a utility class I use to convert the newer java time classes to java util Date objects and vice versa    import java time Instant  import java time LocalDate  import java time LocalDateTime  import java time ZoneId  import java util Date   public class DateUtils      public static Date asDate LocalDate localDate        return Date from localDate atStartOfDay   atZone ZoneId systemDefault    toInstant            public static Date asDate LocalDateTime localDateTime        return Date from localDateTime atZone ZoneId systemDefault    toInstant            public static LocalDate asLocalDate Date date        return Instant ofEpochMilli date getTime    atZone ZoneId systemDefault    toLocalDate           public static LocalDateTime asLocalDateTime Date date        return Instant ofEpochMilli date getTime    atZone ZoneId systemDefault    toLocalDateTime            Edited based on  Oliv comment

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Kotlin Solution   1  Paste this extension function somewhere   fun LocalDate toDate    Date   Date from this atStartOfDay ZoneId systemDefault    toInstant      2  Use it  and never google this again   val myDate   myLocalDate toDate

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Date date   Date from localDate atStartOfDay ZoneId systemDefault    toInstant       That assumes your date chooser uses the system default timezone to transform dates into strings

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Simple  public Date convertFrom LocalDate date        return java sql Timestamp valueOf date atStartOfDay

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public static Date convertToTimeZone Date date  String tzFrom  String tzTo        return Date from LocalDateTime ofInstant date toInstant    ZoneId of tzTo   atZone ZoneId of tzFrom   toInstant

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In order to create a java util Date from a java time LocalDate  you have to   add a time to the LocalDate interpret the date and time within a time zone get the number of seconds   milliseconds since epoch create a java util Date   The code might look as follows   LocalDate localDate   LocalDate now    Date date   new Date localDate atStartOfDay ZoneId of  America New York    toEpochSecond     1000

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java util Date from localDate atStartOfDay   atZone ZoneId systemDefault    toInstant

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This works for me   java util Date d   new SimpleDateFormat  yyyy-MM-dd   parse localDate toString       https   docs oracle com javase 8 docs api java time LocalDate html toString--

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java time has the Temporal interface which you can use to create Instant objects from most of the the time classes  Instant represents milliseconds on the timeline in the Epoch - the base reference for all other dates and times   We need to convert the Date into a ZonedDateTime  with a Time and a Zone  to do the conversion   LocalDate ldate        Instant instant   Instant from ldate atStartOfDay ZoneId of  GMT      Date date   Date from instant

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You can use java sql Date valueOf   method as   Date date   java sql Date valueOf localDate     No need to add time and time zone info here because they are taken implicitly  See LocalDate to java util Date and vice versa simpliest conversion

[java] Convert java.time.LocalDate into java.util.Date type

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