![]() We can format this date easily: SimpleDateFormat formatter = new SimpleDateFormat( "dd-MM-yyyy HH:mm:ss") Īnd running this piece of code would yield: 05-02-2020 10:12:46Īmongst Java's myriad of classes is the Calendar class, which is used to convert dates and time between specific instants and the calendar fields. In Java, getting the current date is as simple as instantiating the Date object from the Java package java.util: Date date = new Date() // This object contains the current date value Note: Keep in mind that this method returns the current value depending on your system time. Running this piece of code would yield: at 10:11:33 UTC SimpleDateFormat formatter= new SimpleDateFormat( "yyyy-MM-dd 'at' HH:mm:ss z") ĭate date = new Date(System.currentTimeMillis()) When converting this number back to a human-readable date, it represents: Wednesday, 5 February 2020 10:08:33.933Īnd to do this in Java, we need only a couple of lines of code: Printing this value out would result in something similar to this: 1580897313933 If you'd like to get a single numeric value of milliseconds passed since the UNIX epoch, it's as easy as: System.currentTimeMillis() Long story short, getting the current date and time in Java is very important and has a myriad of usages, and thankfully, it's really easy to attain it for any kind of use. When we buy something online or make a transaction, our banks offer us the transaction list with the exact timestamps for us to review.When we make an action, we'd want to know the time of it to be available so that we can keep track of them.When we publish blogs on a website, the date of posting gets written down into a database and shown to the reader.Most applications have the need for timestamping events or showing date/times, among many other use-cases: See Also: Calendar.In this article, we'll explore many ways to Get the Current Date and Time in Java. If a week date is given for the calendar type that doesn't If any invalid field values are given in non-lenient mode, or Returns: a Calendar built with parameters of this Calendar.Builder Throws: IllegalArgumentException - if the calendar type is unknown, or ![]() Mode or detected as an invalid value in non-lenient mode. Parameters haven't been given explicitly.Īny out of range field values are either normalized in lenient The default values are used for locale and time zone if these ![]() Note that theĪ GregorianCalendar created with "iso8601" returns Of a GregorianCalendar is set to Date(Long.MIN_VALUE) ![]() If no explicitĬalendar type is given, the locale's default calendar is created. Used to determine what Calendar to be created. The calendar type given by the setCalendarType method or the locale is Returns a Calendar built from the parameters set by the setFields(YEAR, 1, DAY_OF_YEAR, 1).build() Since: 1.8 See Also: Calendar.getInstance(TimeZone, Locale), (Gregorian), assuming that the default ERAĬalendar cal = new Calendar.Builder().setCalendarType("japanese") The following code produces a Japanese Calendar with date (Gregorian) because Monday is the first day of a week with the ISO 8601Ĭalendar cal = new Calendar.Builder().setCalendarType("iso8601") The following code produces a Calendar with date Sample code assumes that theĬalendar constants are statically imported. Therefore, the order of field setting matters. If there areĪny conflicts among field parameters, the resolution rules are applied. Isn't given for the Gregorian calendar, 1970 will be used. Time, calendar specific default values are used when building a If no enough field parameters are given for determining date and/or However, it is permitted to override previous values of the Individual fields will cause an IllegalStateException to be The other is to set individualįield parameters, such as YEAR, to their desired Is to set the instant parameter to a millisecond offset from the Epoch. There are two ways to set a Calendar to a date-time value. Calendar.Builder is used for creating a Calendar from
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