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The java.text.SimpleDateFormat class is used to format and parse a string to date and date to string.One of the constructors of this class accepts a String value representing the desired date format and creates SimpleDateFormat object. To parse/convert a string as a Date object Instantiate this class by passing desired format string.Parse the date string using the parse() method.You can get the epoch time using the getTime() method.ExampleLive Demoimport java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class Sample { public static void main(String args[]) throws ParseException { //Instantiating the SimpleDateFormat class SimpleDateFormat dateformatter = new ... Read More
The getTime() method of the Date class retrieves and returns the epoch time (number of milliseconds from Jan 1st 1970 00:00:00 GMT0.ExampleLive Demoimport java.util.Date; public class Sample { public static void main(String args[]){ //Instantiating the Date class Date date = new Date(); long msec = date.getTime(); System.out.println("Milli Seconds: "+msec); } }OutputMilli Seconds: 1605160094688The getTimeInMillis() method of the calendar class retrieves and returns the time in milli seconds from the epochepoch time (Jan 1st 1970 00:00:00 GMT).ExampleLive Demoimport java.util.Calendar; public class Sample { public static ... Read More
A temporal field is a field of date-time, such as month-of-year or hour-of-minute. These fields are represented by the TemporalField interface and the ChronoField class implements this interface.Following are the list of various temporal fields regarding date supported by the ChronoField class −FieldDescriptionALIGNED_DAY_OF_WEEK_IN_MONTHThis field represents the day of the week with in a month.ALIGNED_DAY_OF_WEEK_IN_YEARThis field represents the aligned day of a week in an year.ALIGNED_WEEK_OF_MONTHThis field represents the aligned wee of a month.ALIGNED_WEEK_OF_YEARThis field represents the aligned week of an year.DAY_OF_MONTHThis field represents the day of a month.DAY_OF_WEEKThis field represents the day of a week.DAY_OF_YEARThis field represents the day of ... Read More
A temporal field is a field of date-time, such as month-of-year or hour-of-minute. These fields are represented by the TemporalField interface and the ChronoField class implements this interface.Following are the list of various temporal fields regarding time supported by the ChronoField class −FieldDescriptionCLOCK_HOUR_OF_AMPMThis field represents the clock hour of a day (am/pm).AMPM_OF_DAYThis field represents the ap/pm of the day.CLOCK_HOUR_OF_DAYThis field represents the clock hour of a day.HOUR_OF_AMPMThis field represents the hour of a day (am/pm).HOUR_OF_DAYThis field represents the hour of a day.INSTANT_SECONDSThis field represents the instant epoch seconds.MICRO_OF_DAYThis field represents the micro of a day.MICRO_OF_SECONDThis field represents the micro of ... Read More
In general, the elapsed time is the time from the starting point to ending point of an event. Following are various ways to find elapsed time in Java −The nanoTime() method returns the current time in nano seconds. To find the elapsed time for the execution of a method in nano seconds −Retrieve the current time using the nanoTime() method.Execute the desired method.Again, retrieve the current time using the nanoTime() method.Finally, Find the difference between the end value and the start value.ExampleLive Demopublic class Example { public void test(){ int num = 0; for(int i=0; i
In general, the elapsed time or, execution is the time from the starting point to ending point of an event. Following are various ways to find elapsed time in Java −The currentTimeMillis() method returns the current time in milliseconds. To find the elapsed time for a method you can get the difference between time values before and after the execution of the desired method.The nanoTime() method returns the current time in nano seconds. To find the elapsed time for a method you can get the difference between time values before and after the execution of the desired method.The now() method ... Read More
In general, the elapsed time is the time from the starting point to ending point of an event. Following are various ways to find elapsed time in Java −Using the currentTimeMillis() methodThe currentTimeMillis() method returns the current time in milliseconds. To find the elapsed time for a method you can get the difference between time values before and after the execution of the desired method.ExampleLive Demopublic class Example { public void test(){ int num = 0; for(int i=0; i
The printf() method is used to print a formatted string, it accepts a string representing a format string and an array of objects representing the elements that are to be in the resultant string, if the number of arguments are more than the number of characters in the format string the excess objects are ignored.Following table lists the various format characters to format time by the Java printf() method along with their description −Format CharactersDescription'H'The corresponding argument is formatted as Hour of the day (00-24).'I'The corresponding argument is formatted as hour of the day (01 -12).'k'The corresponding argument is formatted ... Read More
The printf() method is used to print a formatted string, it accepts a string representing a format string and an array of objects representing the elements that are to be in the resultant string, if the number of arguments are more than the number of characters in the format string the excess objects are ignored.Following table lists the various format characters to print date printf() method along with their description −Format CharactersDescription'B'The corresponding argument is formatted as full month name.'b'The corresponding argument is formatted as abbreviated month name.'h'The corresponding argument is formatted as abbreviated month name.'A'The corresponding argument is formatted as ... Read More
The GregorianCalendar class supports standard calendars it supports Julian and Gregorian calendars you can create an object of GregorianCalendar using one of its constructors. Following are various examples demonstrating how to print date using this class −ExampleFollowing example creates GregorianCalander by passing year, month and date values as parameters to its constructor and prints the date −Live Demoimport java.util.Calendar; import java.util.GregorianCalendar; public class Test { public static void main(String args[]){ //Instantiating the GregorianCalendar GregorianCalendar cal = new GregorianCalendar(2018, 6, 27); System.out.println(cal); System.out.println("Date: "+cal.get(Calendar.DATE)); System.out.println("Month: ... Read More