How to convert java.time.LocalDate to java.util.Date?

By Wayan in Date Time 2 Comments

The following code snippet demonstrate how to convert java.time.LocalDate to java.util.Date and vice versa. In the first part of the code snippet we convert LocalDate to Date and back to LocalDate object. On the second part we convert LocalDateTime to Date and back to LocalDateTime object.

package org.kodejava.datetime;

import java.time.*;
import java.util.Date;

public class LocalDateToDate {
    public static void main(String[] args) {
        // Convert java.time.LocalDate to java.util.Date and back to
        // java.time.LocalDate
        LocalDate localDate = LocalDate.now();
        System.out.println("LocalDate = " + localDate);

        Date date1 = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
        System.out.println("Date      = " + date1);

        localDate = date1.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
        System.out.println("LocalDate = " + localDate);
        System.out.println();

        // Convert java.time.LocalDateTime to java.util.Date and back to
        // java.time.LocalDateTime
        LocalDateTime localDateTime = LocalDateTime.now();
        System.out.println("LocalDateTime = " + localDateTime);

        Date date2 = Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
        System.out.println("Date          = " + date2);

        localDateTime = date2.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();
        System.out.println("LocalDateTime = " + localDateTime);
    }
}

The result of the code snippet:

LocalDate = 2021-11-20
Date      = Sat Nov 20 00:00:00 CST 2021
LocalDate = 2021-11-20

LocalDateTime = 2021-11-20T18:25:05.706380200
Date          = Sat Nov 20 18:25:05 CST 2021
LocalDateTime = 2021-11-20T18:25:05.706
Wayan
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2 Comments

  1. This method does not work for dates before April 1893. A simple test

    @Test
public void test() {
    LocalDate localDate = LocalDate.of(1893, 3, 1);
    Date date = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
    assertEquals("1893-03-01", new SimpleDateFormat("yyyy-mm-dd").format(date));
}

    with the actual value of 1893-06-01 on my machine.

    Reply

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