CODEWITHSUNDEEP
javajava-8java-time
Kavinda Gehan
Kavinda Gehan

Reputation: 4998

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

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?

Upvotes: 476

Views: 633377

Answers (13)

Nicolay
Nicolay

Reputation: 27

Try this:

public Date convertFrom(LocalDate date) {
    return Date.valueOf(date);
}

Upvotes: -2

Aza M.
Aza M.

Reputation: 23

localDate.format(DateTimeFormatter.ofPattern("dd/MM/yyyy"));

Upvotes: -3

George
George

Reputation: 7543

Disclaimer: For illustrating existing java apis only. Should not be used in production code.

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 simplest conversion?

Upvotes: 111

redd77
redd77

Reputation: 337

    LocalDate date = LocalDate.now();
    DateFormat formatter = new SimpleDateFormat("dd-mm-yyyy");
    try {
        Date utilDate= formatter.parse(date.toString());
    } catch (ParseException e) {
        // handle exception
    }

Upvotes: -1

Mahendra Sri Dayarathna
Mahendra Sri Dayarathna

Reputation: 448

java.util.Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());

Upvotes: -6

gyoder
gyoder

Reputation: 4738

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()

Upvotes: 14

nosid
nosid

Reputation: 50024

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);

Upvotes: 15

Artur Luiz Oliveira
Artur Luiz Oliveira

Reputation: 107

Simple

public Date convertFrom(LocalDate date) {
    return java.sql.Timestamp.valueOf(date.atStartOfDay());
}

Upvotes: -3

William Nguyen
William Nguyen

Reputation: 1

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());
}

Upvotes: -1

Kevin Sadler
Kevin Sadler

Reputation: 2456

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);

Upvotes: 20

ceklock
ceklock

Reputation: 6353

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--

Upvotes: 16

Brice Roncace
Brice Roncace

Reputation: 10650

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.

Upvotes: 145

JB Nizet
JB Nizet

Reputation: 691635

Date date = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());

That assumes your date chooser uses the system default timezone to transform dates into strings.

Upvotes: 693

Related Questions