<dependency> <groupId>net.time4j</groupId> <artifactId>time4j-core</artifactId> <version>4.40</version> </dependency> groovy implementation 'net.time4j:time4j-core:4.40' import net.time4j.PlainDate; import net.time4j.format.expert.ChronoFormatter; PlainDate date = PlainDate.of(2021, 1, 1); ChronoFormatter<PlainDate> formatter = ChronoFormatter String formattedDate = formatter.format(date); import net.time4j.PlainTimestamp; import net.time4j.format.expert.ChronoFormatter; PlainTimestamp timestamp = PlainTimestamp.of(2021, 1, 1, 12, 30, 0); ChronoFormatter<PlainTimestamp> formatter = ChronoFormatter String formattedTimestamp = formatter.format(timestamp); import net.time4j.PlainTime; import net.time4j.format.expert.ChronoFormatter; ChronoFormatter<PlainTime> formatter = ChronoFormatter PlainTime parsedTime = formatter.parse("12:30:00.123");