Don't get me wrong, the new java.time API introduced in Java 8 is great and I use it instead of the old one, but progress doesn't always go forwards. With Java 8 you may have to learn a new way how to transform the unix time (number of milliseconds since 1.1.1970) to LocalDate and LocalDateTime (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 Main {
public static void main(String[] args) {
// how to transform unix time (number of milliseconds since
// 1.1.1970) to date / date and time
{
long millis = 1450539174378L;
// unix time to java.util.Date (pre Java 8)
System.out.println(new Date(millis));
// unix time to java.time.LocalDate (since Java 8)
LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(millis), ZoneId.systemDefault());
System.out.println(localDateTime);
// unix time to java.time.LocalDateTime (since Java 8)
LocalDate localDate = LocalDateTime.ofInstant(Instant.ofEpochMilli(millis), ZoneId.systemDefault()).toLocalDate();
System.out.println(localDate);
}
// how to transform date to unix time
{
// get unix time from java.util.Date (pre Java 8)
System.out.println(new Date().getTime());
// get unix time from java.time.LocalDate (since Java 8)
System.out.println(LocalDate.now().atStartOfDay(ZoneId.systemDefault()).toInstant().toEpochMilli());
// get unix time from java.time.LocalDateTime (since Java 8)
System.out.println(LocalDateTime.now().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
}
}
}