import net.time4j.PlainDate; import net.time4j.PlainTime; import net.time4j.ClockUnit; public class Time4JExample { public static void main(String[] args) { PlainDate date = PlainDate.of(2021, 12, 1); int year = date.getYear(); System.out.println("Year: " + year); PlainTime time = PlainTime.of(9, 30); int hour = time.getHour(); System.out.println("Hour: " + hour); PlainDate nextDay = date.plus(1, ClockUnit.DAYS); System.out.println("Next day: " + nextDay); } }