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Showing posts with the label LocalDateTime

Convert Between LocalDateTime to Instant In Java [2021]

Convert Between LocalDateTime to Instant In Java [2021]  In this tutorial, we will cover how to Convert Between LocalDateTime to Instant using  localdatetime.toInstant(ZoneOffset.UTC), localdatetime.atZone(ZoneId.systemDefault()).toInstant(), localdatetime.toEpochSecond(ZoneOffset.UTC) and Instant to LocalDateTime using LocalDateTime.ofInstant(instant, ZoneId.systemDefault()) Timestamp.from(instant).toLocalDateTime() LocalDateTime provides us date-time without timezone often viewed as  year-month-day-hour-minute-second where as Instant provides us instantaneous point on the time-line.  Instant class  stores a long representing epoch-seconds and an int representing nanosecond-of-second . Earlier we recent tutorials we covered how we can convert LocalDate to Instant and Instant to LocalDate in Java. Now we see Conversion between LocalDateTime to Instant using these methods with examples. Contents Convert LocalDateTime to Instant Convert Instant to LocalDateTime Conclusion

Convert between LocalDateTime to ZonedDateTime in Java [2021]

Convert between LocalDateTime to ZonedDateTime in Java [2021]  To Convert LocalDateTime to ZonedDateTime we must add ZoneId with LocalDateTime as ZonedDateTime has ZoneId added with the DateTime. LocalDateTime to ZonedDateTime conversion can be done  using LocalDateTime.atZone(ZoneId zone) method on localdatetime instance. Contents Convert LocalDateTime to ZonedDateTime Example 1: LocalDateTime to ZonedDateTime Example 2: LocalDateTime to ZonedDateTime UTC Example 3: LocalDateTime to ZonedDateTime Change Timezone Example 4: String to ZonedDateTime Convert ZonedDateTime to LocalDateTime Example 1: ZonedDateTime to LocalDateTime Conclusion References Convert LocalDateTime to ZonedDateTime Example 1: LocalDateTime to ZonedDateTime In this example, we are going to convert LocalDateTime instance created using LocalDateTime.now() method to ZonedDateTime instance using  ZonedDateTime. atZone() with system default zone. import java.time.LocalDateTime; import java.t

ZonedDateTime to Date Conversion [2021]

ZonedDateTime to Date Conversion [2021] To convert ZonedDateTime to Date we have to simply convert ZonedDateTime to Instant instance and then instant instance to Date instance. ZonedDateTime to Date Conversion can be done using Date.from(Instant instant) method provided by java.util.Date class . Contents Example 1: ZonedDateTime to Date Example 2: Convert ZonedDateTime to LocalDate Example 3: Convert ZonedDateTime to UTC Example 4: Convert ZonedDateTime to LocalDateTime Conclusion References Example 1: ZonedDateTime to Date In this example, we will take ZonedDateTime instance and convert that to Date instance using Date.from(Instant instant) method. import java.time.Instant; import java.time.ZonedDateTime; import java.util.Date; public class ZonedDateTimetoDateEx1 { public static void main(String[] args) { //Creating ZonedDateTime instance ZonedDateTime time = ZonedDateTime.now(); System.out.println("ZonedDateTime : " + time);

LocalDate to ZonedDateTime Conversion [2021]

LocalDate to ZonedDateTime Conversion [2021] To Convert LocalDate to ZonedDateTime we must add time and zoneId with LocalDate as ZonedDateTime  has time and ZoneId added with the date. LocalDate to ZonedDateTime conversion can be done using  LocalDate. atStartOfDay() method which will first convert localdate to localdatetime   and then localdatetime to ZonedDatetime using atZone(ZoneId zone) method on localdatetime instance. Contents Example 1: LocalDate to ZonedDateTime Example 2: LocalDate to ZonedDateTime UTC Example 3: LocalDate to ZonedDateTime change timezone Example 4: string to ZonedDateTime Conclusion References Example 1: LocalDate to ZonedDateTime In this example, we are going to create a localdate instance and then convert that to ZonedDateTime instance. import java.time.LocalDate; import java.time.ZoneId; import java.time.ZonedDateTime; public class LocalDateToZonedDateTimeEx1 { public static void main(String[] args) { // Create LocalDate i

Java Timestamp to LocalDateTime Conversion [2021]

Java Timestamp to LocalDateTime Conversion  Timestamp  to LocalDateTime Conversion can be done using  toLocalDateTime()  method provided by  Timestamp  class. In the earlier tutorial, we have seen how to Convert Java LocalDateTime to Timestamp . In this tutorial,  we will cover in deep about toLocalDateTime() method of Timestamp class and how we can convert Timestamp to  LocalDateTime. Java Timestamp to LocalDateTime Conversion public LocalDateTime toLocalDateTime() This method converts timestamp object to a LocalDateTime instance. The conversion creates a LocalDateTime that represents the same year, month, day of month, hours, minutes, seconds and nanoseconds date-time value as this Timestamp in the local time zone. Returns: This returns LocalDateTime instance representing the same date-time value as this timestamp in the local time zone. Since: This method is since Java version 1.8. Example: import java.sql.Timestamp; import java.time.LocalDateTime; public class TimeStampToLocalD

Java LocalDateTime to Timestamp Conversion [2021]

Java LocalDateTime to Timestamp Conversion  LocalDateTime to Timestamp Conversion can be done using Timestamp.valueOf() method provided by Timestamp class. In the recent tutorial, we have seen how to Convert  Java Timestamp to LocalDateTime Conversion . In this tutorial, we will cover in deep about valueOf() method of the Timestamp class and how we can convert LocalDateTime to Timestamp. Java LocalDateTime to Timestamp Conversion public static Timestamp valueOf(LocalDateTime dateTime) This method returns an instance of Timestamp from a LocalDateTime instance using the  same year, month, day of month, hours, minutes, seconds and nanoseconds dateTime value as the provided LocalDateTime instance. Parameters: dateTime - a LocalDateTime instance to convert. Returns: a Timestamp instance converted from LocalDateTime. Throws: NullPointerException is thrown if dateTime instance is null. Since: This method is since Java version 1.8. Example: import java.sql.Timestamp; import java.time.LocalD

LocalDateTime parse() Method Example in Java [2021]

LocalDateTime parse() Method Example in Java [2021]  In this tutorial, we will see how to use the LocalDateTime parse() method to convert String to LocalDateTIme instance in Java. In the earlier tutorial, we have seen  LocalDateTime to String Conversion In Java There are two parse() methods present in LocalDateTime class to convert text string to LocalDateTime instance. public static LocalDateTime parse(CharSequence text) public static LocalDateTime parse(CharSequence text,DateTimeFormatter formatter) We will look into both the methods in detail one by one. LocalDateTime parse() : Convert String to LocalDateTime 1. public static LocalDateTime parse(CharSequence text) This method returns LocalDateTime instance from a text string such as 2020-07-03T08:10:48. The string should have valid date-time format and is parsed using DateTimeFormatter.ISO_LOCAL_DATE_TIME. Parameters: text - The text to which needs to be parsed such as "2020-07-03T08:10:48" which is not null. Returns: the

LocalDateTime to String Conversion In Java [2021]

LocalDateTime to String Conversion In Java [2021]  In this tutorial, we will see how we can convert LocalDateTime to String In Java. In the earlier tutorial, we have seen LocalDateTime to date Conversion In Java   LocalDateTime to String Conversion There is LocalDateTime.format(DateTimeFormatter formatter) method to build LocalDateTime to string in java. Here is the method description : public String format(DateTimeFormatter formatter) This method formats date-time passed using the specified formatted. This date-time object will be passed to the formatter to produce a string. Specified by: format method is declared in interface ChronoLocalDateTime<LocalDate>. Parameters: formatter - the formatter to use which is not null. Returns: the formatted date-time string which is not null. Throws: DateTimeException is thrown if an error occurs during printing. Example: import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class LocalDateTimeToStringExa

LocalDateTime to Date Conversion in Java [2021]

LocalDateTime to Date Conversion in Java [2021]  In this tutorial, we will see how to Convert LocalDateTime to Date in Java. In the earlier tutorial, we have covered how we can  Convert LocalDateTime to LocalDate in Java  Here is the brief intro about what is LocalDateTime class in java. LocalDateTime LocalDateTime  is an instance of date-time without a time-zone in the ISO-8601 calendar system, such as 2017-12-03T10:15:30. LocalDateTime is an immutable date-time object that represents a date-time, often viewed as a year-month-day-hour-minute-second. To convert LocalDateTime to date, Date class added one method public static Date from(Instant instant) from 1.8 onwards. so to Convert our LocalDateTime instance to Date we have to first Convert LocalDateTime instance to Instant class object then only we can get Date from LocalDateTime. LocalDateTime to Date Conversion Here is the brief information regarding the method public static Date from(Instant instant) This method gets the instance

LocalDate to LocalDateTime Conversion in Java [2021]

LocalDate to LocalDateTime Conversion in Java [2021] In this tutorial, we will see how to Convert LocalDate to LocalDateTime in Java. In the earlier tutorial, we have covered how we can  Convert LocalDateTime to LocalDate in Java  Here is the brief intro about what is LocalDateTime and LocalDate class in java. LocalDateTime LocalDateTime  is an instance of date-time without a time-zone in the ISO-8601 calendar system, such as 2017-12-03T10:15:30. LocalDateTime is an immutable date-time object that represents a date-time, often viewed as a year-month-day-hour-minute-second. LocalDate LocalDate  provides  date format  as  YYYY-MM-dd  such as 2017-12-03. LocalDate is a value-based class thus use of equals method is recommended for comparisons. The LocalDate class does not have time or timezone data, So LocalDate is preferable for Birthday, National Holiday representation. As we can see from the above introduction LocalDate only have date part so to Convert LocalDate instance to LocalDateT

Convert LocalDateTime to LocalDate in Java

Convert LocalDateTime to LocalDate in Java  In this tutorial, we will see how to Convert LocalDateTime to LocalDate in Java. In the earlier tutorial, we have covered how we can  Convert Java Date to LocalDateTime in Java . Here is the brief intro about what is LocalDateTime and LocalDate class in java. LocalDateTime LocalDateTime  is an instance of date-time without a time-zone in the ISO-8601 calendar system, such as 2017-12-03T10:15:30. LocalDateTime is an immutable date-time object that represents a date-time, often viewed as a year-month-day-hour-minute-second. LocalDate LocalDate class is immutable and thread-safe. This is a value-based class thus use of equals method is recommended for comparisons. LocalDate provides  date format  as  YYYY-MM-dd such as 2017-12-03. The LocalDate class does not have time or timezone data, So LocalDate is preferable for Birthday, National Holiday representation. Convert LocalDateTime to LocalDate To Convert LocalDateTime to LocalDate in Java we w

LocalDateTime now() Java Examples

LocalDateTime now() Java Examples  In this tutorial, we will cover how we can use LocalDateTime now() method in Java with Examples. In the earlier tutorial, we have covered LocalDateTime isBefore() method in Java  which is used to compare two DateTime objects whether one is before than another one. Here is the brief intro about what is LocalDateTime class in java. LocalDateTime LocalDateTime  is an instance of date-time without a time-zone in the ISO-8601 calendar system, such as 2007-12-03T10:15:30. LocalDateTime is an immutable date-time object that represents a date-time, often viewed as a year-month-day-hour-minute-second. There are three now overloaded methods provided by the LocalDateTime class. Let's See each one of them with Example.  LocalDateTime now() Methods 1. public static LocalDateTime now() This now() method with no parameter gets the current date-time from the system clock in the default time-zone. Using this method we are restricted to use inbuild Clock used in t