java.lang.Object
- org.threeten.bp.DateTimeUtils

```
public final class DateTimeUtils
extends Object
```
A set of utilities to assist in bridging the gap to Java 8.
This class is not found in Java SE 8 but provides methods that are.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Date`	`toDate(Instant instant)`	Converts an `Instant` to a `java.util.Date`.
`static GregorianCalendar`	`toGregorianCalendar(ZonedDateTime zdt)`	Converts a `ZonedDateTime` to a `Calendar`.
`static Instant`	`toInstant(Timestamp sqlTimestamp)`	Converts a `java.sql.Timestamp` to an `Instant`.
`static Instant`	`toInstant(Calendar calendar)`	Converts a `Calendar` to an `Instant`.
`static Instant`	`toInstant(Date utilDate)`	Converts a `java.util.Date` to an `Instant`.
`static LocalDate`	`toLocalDate(Date sqlDate)`	Converts a `java.sql.Date` to a `LocalDate`.
`static LocalDateTime`	`toLocalDateTime(Timestamp sqlTimestamp)`	Converts a `java.sql.Timestamp` to a `LocalDateTime`.
`static LocalTime`	`toLocalTime(Time sqlTime)`	Converts a `java.sql.Time` to a `LocalTime`.
`static Date`	`toSqlDate(LocalDate date)`	Converts a `LocalDate` to a `java.sql.Date`.
`static Time`	`toSqlTime(LocalTime time)`	Converts a `LocalTime` to a `java.sql.Time`.
`static Timestamp`	`toSqlTimestamp(Instant instant)`	Converts an `Instant` to a `java.sql.Timestamp`.
`static Timestamp`	`toSqlTimestamp(LocalDateTime dateTime)`	Converts a `LocalDateTime` to a `java.sql.Timestamp`.
`static TimeZone`	`toTimeZone(ZoneId zoneId)`	Converts a `ZoneId` to a `TimeZone`.
`static ZonedDateTime`	`toZonedDateTime(Calendar calendar)`	Converts a `Calendar` to a `ZonedDateTime`.
`static ZoneId`	`toZoneId(TimeZone timeZone)`	Converts a `TimeZone` to a `ZoneId`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - toInstant
```
public static Instant toInstant(Date utilDate)
```
    Converts a java.util.Date to an Instant.
    
    Parameters:
    
    utilDate - the util date, not null
    
    Returns:
    
    the instant, not null
  - toDate
```
public static Date toDate(Instant instant)
```
    Converts an Instant to a java.util.Date.
    Fractions of the instant smaller than milliseconds will be dropped.
    
    Parameters:
    
    instant - the instant, not null
    
    Returns:
    
    the util date, not null
    
    Throws:
    
    IllegalArgumentException - if the conversion fails
  - toInstant
```
public static Instant toInstant(Calendar calendar)
```
    Converts a Calendar to an Instant.
    
    Parameters:
    
    calendar - the calendar, not null
    
    Returns:
    
    the instant, not null
  - toZonedDateTime
```
public static ZonedDateTime toZonedDateTime(Calendar calendar)
```
    Converts a Calendar to a ZonedDateTime.
    Note that GregorianCalendar supports a Julian-Gregorian cutover date and ZonedDateTime does not so some differences will occur.
    
    Parameters:
    
    calendar - the calendar, not null
    
    Returns:
    
    the instant, not null
  - toGregorianCalendar
```
public static GregorianCalendar toGregorianCalendar(ZonedDateTime zdt)
```
    Converts a ZonedDateTime to a Calendar.
    The resulting GregorianCalendar is pure Gregorian and uses ISO week definitions, starting on Monday and with 4 days in a minimal week.
    Fractions of the instant smaller than milliseconds will be dropped.
    
    Parameters:
    
    zdt - the zoned date-time, not null
    
    Returns:
    
    the calendar, not null
    
    Throws:
    
    IllegalArgumentException - if the conversion fails
  - toZoneId
```
public static ZoneId toZoneId(TimeZone timeZone)
```
    Converts a TimeZone to a ZoneId.
    
    Parameters:
    
    timeZone - the time-zone, not null
    
    Returns:
    
    the zone, not null
  - toTimeZone
```
public static TimeZone toTimeZone(ZoneId zoneId)
```
    Converts a ZoneId to a TimeZone.
    
    Parameters:
    
    zoneId - the zone, not null
    
    Returns:
    
    the time-zone, not null
  - toLocalDate
```
public static LocalDate toLocalDate(Date sqlDate)
```
    Converts a java.sql.Date to a LocalDate.
    
    Parameters:
    
    sqlDate - the SQL date, not null
    
    Returns:
    
    the local date, not null
  - toSqlDate
```
public static Date toSqlDate(LocalDate date)
```
    Converts a LocalDate to a java.sql.Date.
    
    Parameters:
    
    date - the local date, not null
    
    Returns:
    
    the SQL date, not null
  - toLocalTime
```
public static LocalTime toLocalTime(Time sqlTime)
```
    Converts a java.sql.Time to a LocalTime.
    
    Parameters:
    
    sqlTime - the SQL time, not null
    
    Returns:
    
    the local time, not null
  - toSqlTime
```
public static Time toSqlTime(LocalTime time)
```
    Converts a LocalTime to a java.sql.Time.
    
    Parameters:
    
    time - the local time, not null
    
    Returns:
    
    the SQL time, not null
  - toSqlTimestamp
```
public static Timestamp toSqlTimestamp(LocalDateTime dateTime)
```
    Converts a LocalDateTime to a java.sql.Timestamp.
    
    Parameters:
    
    dateTime - the local date-time, not null
    
    Returns:
    
    the SQL timestamp, not null
  - toLocalDateTime
```
public static LocalDateTime toLocalDateTime(Timestamp sqlTimestamp)
```
    Converts a java.sql.Timestamp to a LocalDateTime.
    
    Parameters:
    
    sqlTimestamp - the SQL timestamp, not null
    
    Returns:
    
    the local date-time, not null
  - toSqlTimestamp
```
public static Timestamp toSqlTimestamp(Instant instant)
```
    Converts an Instant to a java.sql.Timestamp.
    
    Parameters:
    
    instant - the instant, not null
    
    Returns:
    
    the SQL timestamp, not null
  - toInstant
```
public static Instant toInstant(Timestamp sqlTimestamp)
```
    Converts a java.sql.Timestamp to an Instant.
    
    Parameters:
    
    sqlTimestamp - the SQL timestamp, not null
    
    Returns:
    
    the instant, not null

Class DateTimeUtils

Method Summary

Methods inherited from class java.lang.Object

Method Detail

toInstant

toDate

toInstant

toZonedDateTime

toGregorianCalendar

toZoneId

toTimeZone

toLocalDate

toSqlDate

toLocalTime

toSqlTime

toSqlTimestamp

toLocalDateTime

toSqlTimestamp

toInstant