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()); } } }
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