Date to LocalDateTime and vise versa

JavaTimeToDate.java

package date;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Date;

public class JavaTimeToDate {
	public static void main(String[] args) {
		ZoneId defaultZoneId = ZoneId.systemDefault();
		System.out.println("System Default TimeZone : " + defaultZoneId);
		LocalDate localDate = LocalDate.of(2016, 8, 19);
		Date date = Date.from(localDate.atStartOfDay(defaultZoneId).toInstant());
		System.out.println("\n1. LocalDate -> Date");
		System.out.println("localDate : " + localDate);
		System.out.println("date : " + date);
		//
		LocalDateTime localDateTime = LocalDateTime.of(2016, 8, 19, 21, 46, 31);
		Date date2 = Date.from(localDateTime.atZone(defaultZoneId).toInstant());
		System.out.println("\n2. LocalDateTime -> Date");
		System.out.println("localDateTime : " + localDateTime);
		System.out.println("date2 : " + date2);
		//
		ZonedDateTime zonedDateTime = localDateTime.atZone(defaultZoneId);
		Date date3 = Date.from(zonedDateTime.toInstant());
		System.out.println("\n3. ZonedDateTime -> Date");
		System.out.println("zonedDateTime : " + zonedDateTime);
		System.out.println("date3 : " + date3);
		//
		Date date4 = new Date();
		LocalDateTime localDateTimeFormDate = LocalDateTime.from(date4.toInstant().atZone(defaultZoneId));
		System.out.println("\n4. Date -> LocaleDateTime");
		System.out.println("date4 : " + date4);
		System.out.println("localDateTimeFormDate : " + localDateTimeFormDate);
	}
}