JDK8: unable to parse LocalTime

Question

I managed to parse a String to a LocalDate object:

DateTimeFormatter f1=DateTimeFormatter.ofPattern(\"dd MM yyyy\");
LocalDate d=Lo         


        

Answer 1

In this case Unable to obtain LocalTime from TemporalAccessor means it cannot determine the how far through the day the given string represents i.e. there is not enough information to construct a LocalTime. Behind the scenes, the code looks something like this expanded Java 8 version (which gives a similar error):

DateTimeFormatter f2 = DateTimeFormatter.ofPattern("hh mm");
TemporalAccessor temporalAccessor = f2.parse("11 08");
LocalTime t = temporalAccessor.query(LocalTime::from);
System.out.println(t);

The LocalTime::from documentation says

The conversion uses the TemporalQueries.localTime() query, which relies on extracting the NANO_OF_DAY field.

Your error is telling you that the TemporalAccessor only has two fields, neither of which is a NANO_OF_DAY field. The minimum allowable patterns for retrieving a LocalTime using a DateTimeFormatter are:

DateTimeFormatter.ofPattern("ha");
DateTimeFormatter.ofPattern("Ka");
DateTimeFormatter.ofPattern("ah");
DateTimeFormatter.ofPattern("aK");
DateTimeFormatter.ofPattern("k");
DateTimeFormatter.ofPattern("H");

Your pattern must contain at least one of those strings to get a NANO_OF_DAY field in the internal TemporalAccessor from which a LocalTime can be constructed.