![]() ![]() However, it can be necessary eventually to have one more information about the system hour: the time zone. The solutions showed so far are helpful for most of the date/time problems in an application. If the application needs to apply both date and time regularly, then the LocalDateTime class can be helpful, which merges the features presented until now in just one object. Long untilTime = localTime.until(LocalTime.now(), ChronoUnit.MICROS) Microseconds from specific time until now Long untilMonths = yesterday.until(date, ChronoUnit.MONTHS) Period object from yesterday until a specificdate LocalDate yesterday = LocalDate.now().minusDays(1) Int compareDates = pareTo(LocalDate.now().plusMonths(3)) // returns -1 Comparing two dates, returns negative if the comparator is less, positive if is more and zero if equals LocalTime localTime = LocalTime.now().minusHours(12) īoolean isbeforeDate = date.isBefore(LocalDate.now()) // falseīoolean isafterTime = localTime.isAfter(LocalTime.now().minusHours(30)) //true LocalDate date = LocalDate.now().plusDays(7) The following code has some examples of the topics discussed just now. It's also possible to get the interval between two dates or two times through until(). Compare date/time objects it's possible in two ways, by using the isBefore(), isAfter(), and isEqual() methods which return a boolean value, or using the int returned by the compareTo() method, fitting for the three situations. Adding days to a LocalDate can be done with the plusDays() method while subtracting hours to a LocalTime perform with the minusHours() one. Some useful operations available in this Java package are related to add and subtract some amounts from our date/time objects and compare to distinct dates to which one comes first in chronological order. LocalTime object with specific hour, minute, seconds and nanoseconds 23:45:12:500000000 LocalTime localTime = LocalTime.of(23, 45, 12) LocalTime object with specific hour, minute and seconds 23:45:12 LocalTime localTime = LocalTime.of(23, 45) LocalTime object with specific hour and minute 23:45 An example of this is that the methods showed before will return a resembling result. Apart from that, both have very similar behavior. With the only distinction of dealing with hours, minutes, seconds, and nanoseconds. The LocalTime class works similarly to LocalDate. Return a Local Date object in 12-25-1995ĭate = LocalDate.parse("", DateTimeFormatter.ofPattern("d/M/y")) Return a Local Date object in 04-05-2019 LocalDate date = LocalDate.of(1995, 07, 21) ![]() Return a Local Date object in 07-21-1995 To get a specific date and save in a variable it can be used the of() method with the literal values to year, month, and day of the month has parameters, or even sending a string to the parse() method, some combinations of both are in the code below. The LocalDate class delivers an API to obtain and manipulate the current operating system date information, caring all the logic to add days, weeks, and other operations without losing data consistency. However, the amount of additional logic needed to implements date operations it's immense and unnecessary. When developing a system, many times it will be needed to have access to the current date, be to keep your logs in a chronology order, to save the day of the database insertion, or verify if a reminder wasn't set up for the past year, in all these cases the developer can make a class with just a few variables like day, month and year. import java.time.* įirst of all, let's introduce the two main classes from the package and some of the numerous ways to handle its information: LocalDate and LocalTime. This article brings a brief introduction to some classes available by the Date/Time Java API, with samples to the main characteristics of each one of them. ![]() The new API introduced in SE 8 solves these problems, also bringing more friendly methods and documentation, helping programmers to use its features without creating headaches with new obstacles appearing. It's up to the developer to get around the possible troubles using these classes in a multi-thread scenario and add additional logic to deal with different time zones. ![]() Both have two main issues: they are no thread safe and don't support time zone information. All of them follow the ISO calendar system defined by the proleptic Gregorian rules.īefore that, Java has two separate packages to handle this type of information, and. When imported, the "java time" gives access to classes like Instant, LocalTime, LocalDate, OffsetTime, and others. Reading time: 35 minutes | Coding time: 10 minutesĪt Java Standard Edition 8 was included a new API package to handle with date-time concepts. ![]()
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