You can use the atStartOfDay() method from LocalDate class to convert a LocalDate into a LocalDateTime. Then, you need to convert LocalDateTime to a ZonedDateTime using the atZone() method.
Here is an example:
package org.kodejava.datetime;
import java.time.*;
public class LocalDateToZonedDateTimeExample {
public static void main(String[] args) {
// Create a LocalDate
LocalDate date = LocalDate.of(2023, Month.JULY, 9);
System.out.println("LocalDate: " + date);
// Convert LocalDate to LocalDateTime
LocalDateTime dateTime = date.atStartOfDay();
System.out.println("LocalDateTime: " + dateTime);
// Convert LocalDateTime to ZonedDateTime
ZonedDateTime zonedDateTime = dateTime.atZone(ZoneId.systemDefault());
System.out.println("ZonedDateTime: " + zonedDateTime);
}
}
Output:
LocalDate: 2023-07-09
LocalDateTime: 2023-07-09T00:00
ZonedDateTime: 2023-07-09T00:00+08:00[Asia/Makassar]
In this example, we’re creating a LocalDate for July 9, 2023. Then we’re converting it to a LocalDateTime, and then to a ZonedDateTime. The atStartOfDay() method returns a LocalDateTime set to the start of the day (00:00) on the date of this LocalDate. The atZone() method then takes the ZoneId and returns a ZonedDateTime representing the start of the day in that timezone.
The ZoneId.systemDefault() returns the system default time zone. If you want to convert it to a specific time zone, you can specify the timezone as a string, like this: ZoneId.of("America/New_York").
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