Java 8 Date/Time-API example

Java8DateTimeApiExample.java

import java.time.Duration;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

public class Java8DateTimeApiExample {

  public static void main(String[] args) {
    ZonedDateTime now = ZonedDateTime.now();

    int daysOffset = (int) (Math.random() * 10) + 1;
    System.out.printf("Subtracting %d day%s\n", daysOffset, daysOffset == 1 ? "" : "s");
    ZonedDateTime xDaysAgo = now.minusDays(daysOffset);

    // More than 1 week ago?
    if (Duration.between(xDaysAgo, now).getSeconds() > Duration.ofDays(7).getSeconds()) {
      System.out.println(xDaysAgo.format(DateTimeFormatter.ofPattern("d. M. yyyy")));
    } else {
      System.out.println(xDaysAgo.format(DateTimeFormatter.ofPattern("d. M. yyyy, HH:mm")));
    }
  }
}