DateTimeUtils (ThreeTen backport for java.time package 1.0.0 API)

java.lang.Object
- java.time.DateTimeUtils

```
public final class DateTimeUtils
extends java.lang.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

Methods
Modifier and Type	Method and Description
`static java.util.Date`	`toDate(Instant instant)` Converts an `Instant` to a `java.util.Date`.
`static java.util.GregorianCalendar`	`toGregorianCalendar(ZonedDateTime zdt)` Converts a `ZonedDateTime` to a `Calendar`.
`static Instant`	`toInstant(java.util.Calendar calendar)` Converts a `Calendar` to an `Instant`.
`static Instant`	`toInstant(java.util.Date utilDate)` Converts a `java.util.Date` to an `Instant`.
`static Instant`	`toInstant(java.sql.Timestamp sqlTimestamp)` Converts a `java.sql.Timestamp` to an `Instant`.
`static LocalDate`	`toLocalDate(java.sql.Date sqlDate)` Converts a `java.sql.Date` to a `LocalDate`.
`static LocalDateTime`	`toLocalDateTime(java.sql.Timestamp sqlTimestamp)` Converts a `java.sql.Timestamp` to a `LocalDateTime`.
`static LocalTime`	`toLocalTime(java.sql.Time sqlTime)` Converts a `java.sql.Time` to a `LocalTime`.
`static java.sql.Date`	`toSqlDate(LocalDate date)` Converts a `LocalDate` to a `java.sql.Date`.
`static java.sql.Time`	`toSqlTime(LocalTime time)` Converts a `LocalTime` to a `java.sql.Time`.
`static java.sql.Timestamp`	`toSqlTimestamp(Instant instant)` Converts an `Instant` to a `java.sql.Timestamp`.
`static java.sql.Timestamp`	`toSqlTimestamp(LocalDateTime dateTime)` Converts a `LocalDateTime` to a `java.sql.Timestamp`.
`static java.util.TimeZone`	`toTimeZone(ZoneId zoneId)` Converts a `ZoneId` to a `TimeZone`.
`static ZonedDateTime`	`toZonedDateTime(java.util.Calendar calendar)` Converts a `Calendar` to a `ZonedDateTime`.
`static ZoneId`	`toZoneId(java.util.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(java.util.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 java.util.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:
    
    java.lang.IllegalArgumentException - if the conversion fails
  - toInstant
```
public static Instant toInstant(java.util.Calendar calendar)
```
    Converts a Calendar to an Instant.
    
    Parameters:
    calendar - the calendar, not null
    
    Returns:
    the instant, not null
  - toZonedDateTime
```
public static ZonedDateTime toZonedDateTime(java.util.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 java.util.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:
    
    java.lang.IllegalArgumentException - if the conversion fails
  - toZoneId
```
public static ZoneId toZoneId(java.util.TimeZone timeZone)
```
    Converts a TimeZone to a ZoneId.
    
    Parameters:
    timeZone - the time-zone, not null
    
    Returns:
    the zone, not null
  - toTimeZone
```
public static java.util.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(java.sql.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 java.sql.Date toSqlDate(LocalDate date)
```
    Converts a LocalDate to a java.sql.Date.
    
    Parameters:
    localDate - the local date, not null
    
    Returns:
    the SQL date, not null
  - toLocalTime
```
public static LocalTime toLocalTime(java.sql.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 java.sql.Time toSqlTime(LocalTime time)
```
    Converts a LocalTime to a java.sql.Time.
    
    Parameters:
    localTime - the local time, not null
    
    Returns:
    the SQL time, not null
  - toSqlTimestamp
```
public static java.sql.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(java.sql.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 java.sql.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(java.sql.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