How to Convert Date to LocalDate

In this post we will look how to convert Date to LocalDate in Java. We will also convert LocalDateTime to Date.

1. Convert Date to LocalDate

Java 8 introduces a new API to work with date and time. In this section, let’s see how to convert Date to LocalDate with Java.

1.1 Date To LocalDate

Date date = new Date();

LocalDate localDate = Instant.ofEpochMilli(date.getTime())
      .atZone(ZoneId.systemDefault())
      .toLocalDate();

System.out.println(date); //Thu Oct 01 16:10:58 PDT 2020

2. Convert LocalDate to Date

There might be some use case where we like to convert LocalDate to Date in Java. This section will take a look at this option.

LocalDate localDate = LocalDate.now();

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

System.out.println(date); //Thu Oct 01 00:00:00 PDT 2020

Date date2 = Date.from(localDate.atStartOfDay(
            ZoneId.systemDefault())
            .toInstant());

System.out.println(date2); //Thu Oct 01 00:00:00 PDT 2020

3. DateUtils for Conversion

It’s always a best to create your own small utility class to perform the date conversion. Let’s write a small utility class to perform the following for us, and we can use it throughout our project.

  1. Convert Date to LocalDate using system default ZoneId.
  2. Date to LocalDate using supplied ZoneId.
  3. Convert LocalDate back to Date in Java using
package com.javadevjournal.date;

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

public final class JDJDateUtils {

    public static LocalDate convertToLocalDate(Date date) {
        return Instant.ofEpochMilli(date.getTime())
            .atZone(ZoneId.systemDefault())
            .toLocalDate();
    }

    public static LocalDate convertToLocalDate(Date date, ZoneId zoneId) {
        return Instant.ofEpochMilli(date.getTime())
            .atZone(zoneId)
            .toLocalDate();
    }

    public static Date convertToDate(LocalDate date) {
        return Date.from(date
            .atStartOfDay().atZone(
                ZoneId.systemDefault())
            .toInstant());
    }

    public static Date convertToDate(LocalDate date, ZoneId zoneId) {
        return Date.from(date
            .atStartOfDay().atZone(
                zoneId)
            .toInstant());
    }
}

Let’s see how to use this utility class for better readability and maintenance.

Date date = new Date();

LocalDate localDate = JDJDateUtils.convertToLocalDate(date);
System.out.println(localDate); //2020-10-01

LocalDate localDate1 = JDJDateUtils.convertToLocalDate(date, ZoneId.of("Asia/Kolkata"));
System.out.println(localDate1); //2020-10-02

LocalDate localDate3 = LocalDate.now();

Date date1 = JDJDateUtils.convertToDate(localDate3);
System.out.println(date1); //Thu Oct 01 00:00:00 PDT 2020

Date date2 = JDJDateUtils.convertToDate(localDate3, ZoneId.of("Asia/Kolkata"));
System.out.println(date2); //Wed Sep 30 11:30:00 PDT 2020

Summary

In this post, we saw how to convert Date to LocalDate in Java and vice versa. We also created a small utility class to handle date conversion more efficiently and avoid code duplication. The source code is available on the GitHub.

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