Serializable
, Cloneable
, Comparable<Date>
public class Timestamp extends Date
A thin wrapper around java.util.Date
that allows the JDBC API to identify this as an SQL TIMESTAMP
value. It adds the ability to hold the SQL TIMESTAMP
fractional seconds value, by allowing the specification of fractional seconds to a precision of nanoseconds. A Timestamp also provides formatting and parsing operations to support the JDBC escape syntax for timestamp values.
The precision of a Timestamp object is calculated to be either:
19
, which is the number of characters in yyyy-mm-dd hh:mm:ss 20 + s
, which is the number of characters in the yyyy-mm-dd hh:mm:ss.[fff...] and s
represents the scale of the given Timestamp, its fractional seconds precision. Note: This type is a composite of a java.util.Date
and a separate nanoseconds value. Only integral seconds are stored in the java.util.Date
component. The fractional seconds - the nanos - are separate. The Timestamp.equals(Object)
method never returns true
when passed an object that isn't an instance of java.sql.Timestamp
, because the nanos component of a date is unknown. As a result, the Timestamp.equals(Object)
method is not symmetric with respect to the java.util.Date.equals(Object)
method. Also, the hashCode
method uses the underlying java.util.Date
implementation and therefore does not include nanos in its computation.
Due to the differences between the Timestamp
class and the java.util.Date
class mentioned above, it is recommended that code not view Timestamp
values generically as an instance of java.util.Date
. The inheritance relationship between Timestamp
and java.util.Date
really denotes implementation inheritance, and not type inheritance.
Constructor | Description |
---|---|
Timestamp |
Deprecated. |
Timestamp |
Constructs a Timestamp object using a milliseconds time value. |
Modifier and Type | Method | Description |
---|---|---|
boolean |
after |
Indicates whether this Timestamp object is later than the given Timestamp object. |
boolean |
before |
Indicates whether this Timestamp object is earlier than the given Timestamp object. |
int |
compareTo |
Compares this Timestamp object to the given Timestamp object. |
int |
compareTo |
Compares this Timestamp object to the given Date object. |
boolean |
equals |
Tests to see if this Timestamp object is equal to the given object. |
boolean |
equals |
Tests to see if this Timestamp object is equal to the given Timestamp object. |
static Timestamp |
from |
Obtains an instance of Timestamp from an Instant object. |
int |
getNanos() |
Gets this Timestamp object's nanos value. |
long |
getTime() |
Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this Timestamp object. |
int |
hashCode() |
Returns a hash code value for this object. |
void |
setNanos |
Sets this Timestamp object's nanos field to the given value. |
void |
setTime |
Sets this Timestamp object to represent a point in time that is time milliseconds after January 1, 1970 00:00:00 GMT. |
Instant |
toInstant() |
Converts this Timestamp object to an Instant . |
LocalDateTime |
toLocalDateTime() |
Converts this Timestamp object to a LocalDateTime . |
String |
toString() |
Formats a timestamp in JDBC timestamp escape format. |
static Timestamp |
valueOf |
Converts a String object in JDBC timestamp escape format to a Timestamp value. |
static Timestamp |
valueOf |
Obtains an instance of Timestamp from a LocalDateTime object, with the same year, month, day of month, hours, minutes, seconds and nanos date-time value as the provided LocalDateTime . |
after, before, clone, getDate, getDay, getHours, getMinutes, getMonth, getSeconds, getTimezoneOffset, getYear, parse, setDate, setHours, setMinutes, setMonth, setSeconds, setYear, toGMTString, toLocaleString, UTC
@Deprecated(since="1.2") public Timestamp(int year, int month, int date, int hour, int minute, int second, int nano)
Timestamp(long millis)
Timestamp
object initialized with the given values.year
- the year minus 1900month
- 0 to 11date
- 1 to 31hour
- 0 to 23minute
- 0 to 59second
- 0 to 59nano
- 0 to 999,999,999IllegalArgumentException
- if the nano argument is out of boundspublic Timestamp(long time)
Timestamp
object using a milliseconds time value. The integral seconds are stored in the underlying date value; the fractional seconds are stored in the nanos
field of the Timestamp
object.time
- milliseconds since January 1, 1970, 00:00:00 GMT. A negative number is the number of milliseconds before January 1, 1970, 00:00:00 GMT.public void setTime(long time)
Timestamp
object to represent a point in time that is time
milliseconds after January 1, 1970 00:00:00 GMT.public long getTime()
Timestamp
object.public static Timestamp valueOf(String s)
String
object in JDBC timestamp escape format to a Timestamp
value.s
- timestamp in format yyyy-[m]m-[d]d hh:mm:ss[.f...]
. The fractional seconds may be omitted. The leading zero for mm
and dd
may also be omitted.Timestamp
valueIllegalArgumentException
- if the given argument does not have the format yyyy-[m]m-[d]d hh:mm:ss[.f...]
public String toString()
yyyy-mm-dd hh:mm:ss.fffffffff
, where fffffffff
indicates nanoseconds.public int getNanos()
Timestamp
object's nanos
value.Timestamp
object's fractional seconds componentpublic void setNanos(int n)
Timestamp
object's nanos
field to the given value.n
- the new fractional seconds componentIllegalArgumentException
- if the given argument is greater than 999999999 or less than 0public boolean equals(Timestamp ts)
Timestamp
object is equal to the given Timestamp
object.ts
- the Timestamp
value to compare withtrue
if the given Timestamp
object is equal to this Timestamp
object; false
otherwisepublic boolean equals(Object ts)
Timestamp
object is equal to the given object. This version of the method equals
has been added to fix the incorrect signature of Timestamp.equals(Timestamp)
and to preserve backward compatibility with existing class files. Note: This method is not symmetric with respect to the equals(Object)
method in the base class.public boolean before(Timestamp ts)
Timestamp
object is earlier than the given Timestamp
object.ts
- the Timestamp
value to compare withtrue
if this Timestamp
object is earlier; false
otherwisepublic boolean after(Timestamp ts)
Timestamp
object is later than the given Timestamp
object.ts
- the Timestamp
value to compare withtrue
if this Timestamp
object is later; false
otherwisepublic int compareTo(Timestamp ts)
Timestamp
object to the given Timestamp
object.ts
- the Timestamp
object to be compared to this Timestamp
object0
if the two Timestamp
objects are equal; a value less than 0
if this Timestamp
object is before the given argument; and a value greater than 0
if this Timestamp
object is after the given argument.public int compareTo(Date o)
Timestamp
object to the given Date
object.compareTo
in interface Comparable<Date>
compareTo
in class Date
o
- the Date
to be compared to this Timestamp
object0
if this Timestamp
object and the given object are equal; a value less than 0
if this Timestamp
object is before the given argument; and a value greater than 0
if this Timestamp
object is after the given argument.public int hashCode()
long
value returned by the Date.getTime()
method. That is, the hash code is the value of the expression: The(int)(this.getTime()^(this.getTime() >>> 32))
hashCode
method uses the underlying java.util.Date
implementation and therefore does not include nanos in its computation.public static Timestamp valueOf(LocalDateTime dateTime)
Timestamp
from a LocalDateTime
object, with the same year, month, day of month, hours, minutes, seconds and nanos date-time value as the provided LocalDateTime
. The provided LocalDateTime
is interpreted as the local date-time in the local time zone.
dateTime
- a LocalDateTime
to convertTimestamp
objectNullPointerException
- if dateTime
is null.public LocalDateTime toLocalDateTime()
Timestamp
object to a LocalDateTime
. The conversion creates a LocalDateTime
that represents the same year, month, day of month, hours, minutes, seconds and nanos date-time value as this Timestamp
in the local time zone.
LocalDateTime
object representing the same date-time valuepublic static Timestamp from(Instant instant)
Timestamp
from an Instant
object. Instant
can store points on the time-line further in the future and further in the past than Date
. In this scenario, this method will throw an exception.
instant
- the instant to convertTimestamp
representing the same point on the time-line as the provided instantNullPointerException
- if instant
is null.IllegalArgumentException
- if the instant is too large to represent as a Timestamp
public Instant toInstant()
Timestamp
object to an Instant
. The conversion creates an Instant
that represents the same point on the time-line as this Timestamp
.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.sql/java/sql/Timestamp.html
Timestamp(long millis)