JodaTime整数最小/最大值解析

Question

Can someone give me some information about this parsing behavior of JodaTime?

String minValueString = new DateTime(Long.MIN_VALUE).toString();
System.out.println(minValueString);
DateTime minDateTime = DateTime.parse(minValueString);
System.out.println(minDateTime.toString());

prints this,

-292275055-05-16T17:40:32.192+00:53:28

but throws this Exception for the parsing part

org.joda.time.IllegalFieldValueException: Cannot parse "-292275055-05-16T17:40:32.192+00:53:28": Value -292275055 for year must be in the range [-292275054,292278993]

Answer 1

Java 8's JSR310 (based on JodaTime) has a DateTime.MIN_VALUE and MAX_VALUE and the behaviour outside this range is not supported (as @Magnilex pointed out).

LocalDateTime.of( ... )

throws

DateTimeException - if the value of any field is out of range, or if the day-of-month is invalid for the month-year

I suggest you migration to JSR-310 if you can. It is built in to Java 8 and there is a backport for earlier version.

https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html

The problem with the example above is that the start of the year -292275054-01-01 is out side the range so it cannot store this value so it parse the rest of the date. It could do this in theory with special handling but since this is a date before the dinosaurs lived and less than MIN_VALUE, you shouldn't expect it to be valid.