java-time

This question already has an answer here: How to format YearMonth and MonthDay depending on a Locale? 3 answers The java.time classes built into Java 8 and later offer the MonthDay and YearMonth classes. Their toString and parse methods use standard ISO 8601 formats ( --MM-DD & YYYY-MM ), which is wise. For presentation to humans, the standard formats may not be suitable. Is there anyway to generate an automatically localized string to represent the values in objects of either MonthDay or YearMonth ? For example, in the United States users might typically want MM/DD for month-day and MM/YY for

I need to parse different time format into BASIC_ISO_DATE . Right now, there are 4 types of date format: 2016-10-01 (ISO_LOCAL_DATE) 2016T 201610T 2016-02-07T22:03:39.937Z (ISO 8601) Need to parse to 20161001 and print out, with default day is 01 , default month Jan . Examples: 2016T -> 20160101 201610T -> 20161001 How can I use DateTimeFormatter to achieve this? Just to complement @Flown's answer (which works perfectly BTW), you can also use optional patterns (delimited by [] ): DateTimeFormatter parser = new DateTimeFormatterBuilder() // optional ISO8601 date/time and offset .appendOptional

I wonder is it possible to parse clock time hour:minute:second in Java 8? e.g. final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss"); final String str = "12:22:10"; final LocalDateTime dateTime = LocalDateTime.parse(str, formatter); I tried but get this exception: Exception in thread "main" java.time.format.DateTimeParseException: Text '12:22:10' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 12:22:10 of type java.time.format.Parsed greg-449 Since you only have a time use the LocalTime class: DateTimeFormatter formatter =

I need to output the current date in the format week-based-year - week-of-week-based-year , i.e. using the ISO week date where the week always starts on a Monday and the first week of the year is the first one that has at least four days in January (so the week with the first Thursday in January). Since 31 December 2015 was a Thursday, the Friday through Sunday, i.e. 1st through 3rd of January 2016, all belong in the 53rd week of 2015 (a "long year"), and the first week of 2016 starts on Monday, 4 January. From the DateTimeFormatter spec , I would have expected that I can just use the pattern

In the following snipped the property $F is of class java.time.LocalDateTime or java.time.LocalDate . <textField pattern="EE. dd.MM.yyyy"> <reportElement...> </reportElement> <textFieldExpression><![CDATA[$F{theLocalDateTime}]]></textFieldExpression> </textField> How can I format this property with textField pattern in jasper reports? Petter Friberg To use the pattern attribute in current version of jasper-report for Date/Time object you need a java.util.Date class or one of it's subclasses. The solution is to convert java.time.LocalDate and java.time.LocalDateTime Converting to java.util.Date

I'm using the library described the Jackson Datatype JSR310 page but I'm still having difficulty getting it to work. I have configured the following bean: @Bean @Primary public ObjectMapper objectMapper() { ObjectMapper mapper = new ObjectMapper(); mapper.registerModule(new JSR310Module()); return mapper; } When I call my REST API the date format output is yyyy-MM-dd'T'HH:ss.SSSSSS , e.g. 2015-04-11T00:10:38.905847 . This gets handled by my AngularJS code just fine. When I want to submit something to the REST API the date is posted as yyyy-MM-dd'T'HH:mm:ss.SSS'Z' , e.g. 2015-04-09T08:30:00

In old java I can do it in that way: System.out.println(new SimpleDateFormat("yyyy w", Locale.UK).parse("2015 1")); // shows Mon Dec 29 00:00:00 CET 2014 System.out.println(new SimpleDateFormat("yyyy w", Locale.US).parse("2015 1")); // shows Mon Dec 28 00:00:00 CET 2014 I would like to use java.time in Java 8. System.out.println( LocalDate.parse("2015 1", DateTimeFormatter.ofPattern("yyyy w", Locale.US))); Result: java.time.format.DateTimeParseException: Text '2015 1' could not be parsed: Unable to obtain LocalDate from TemporalAccessor: {WeekOfWeekBasedYear[WeekFields[SUNDAY,1]]=1, Year=2015}

I'd like to parse '2015-10-01' with LocalDateTime . What I have to do is LocalDate localDate = LocalDate.parse('2015-10-01'); LocalDateTime localDateTime = localDateTime.of(localDate, LocalTime.MIN); But I'd like to parse it in one pass like // throws DateTimeParseException LocalDateTime date = LocalDateTime.parse('2015-10-01', DateTimeFormatter.ISO_LOCAL_DATE); Also a small difference of a string throws the exception as well. // throws DateTimeParseException LocalDate localDate = LocalDate.parse("2015-9-5", DateTimeFormatter.ISO_LOCAL_DATE); Can I parse date strings leniently with Java 8 Date