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| java.lang.Object
 java.util.Date
java.sql.Timestamp
| Timestamp | | public class Timestamp extends java.util.Date (Code) | | 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
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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.
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| Constructor Summary | |
| public | Timestamp(int year, int month, int date, int hour, int minute, int second, int nano)
Constructs a Timestamp object initialized
with the given values. | | public | Timestamp(long time)
Constructs a Timestamp object
using a milliseconds time value. |
| Method Summary | |
| public boolean | after(Timestamp ts)
Indicates whether this Timestamp object is
later than the given Timestamp object. | | public boolean | before(Timestamp ts)
Indicates whether this Timestamp object is
earlier than the given Timestamp object. | | public int | compareTo(Timestamp ts)
Compares this Timestamp object to the given
Timestamp object. | | public int | compareTo(java.util.Date o)
Compares this Timestamp object to the given
Date, which must be a Timestamp
object. | | public boolean | equals(Timestamp ts)
Tests to see if this Timestamp object is
equal to the given Timestamp object. | | public boolean | equals(java.lang.Object ts)
Tests to see if this Timestamp object is
equal to the given object. | | public int | getNanos()
Gets this Timestamp object's nanos value. | | public long | getTime()
Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT
represented by this Timestamp object. | | public void | setNanos(int n)
Sets this Timestamp object's nanos field
to the given value. | | public void | setTime(long time)
Sets this Timestamp object to represent a point in time that is
time milliseconds after January 1, 1970 00:00:00 GMT. | | public String | toString()
Formats a timestamp in JDBC timestamp escape format. | | public static Timestamp | valueOf(String s)
Converts a String object in JDBC timestamp escape format to a
Timestamp value.
Parameters:
s - timestamp in format yyyy-mm-dd hh:mm:ss[.f...]. |
| serialVersionUID | | final static long serialVersionUID(Code) | | |
| Timestamp | | public Timestamp(int year, int month, int date, int hour, int minute, int second, int nano)(Code) | | Constructs a Timestamp object initialized
with the given values.
Parameters:
year - the year minus 1900
Parameters:
month - 0 to 11
Parameters:
date - 1 to 31
Parameters:
hour - 0 to 23
Parameters:
minute - 0 to 59
Parameters:
second - 0 to 59
Parameters:
nano - 0 to 999,999,999
exception:
IllegalArgumentException - if the nano argument is out of bounds |
| Timestamp | | public Timestamp(long time)(Code) | | Constructs a 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.
Parameters:
time - milliseconds since January 1, 1970, 00:00:00 GMT.A negative number is the number of milliseconds beforeJanuary 1, 1970, 00:00:00 GMT.
See Also: java.util.Calendar
See Also: |
| after | | public boolean after(Timestamp ts)(Code) | | Indicates whether this Timestamp object is
later than the given Timestamp object.
Parameters:
ts - the Timestamp value to compare with true if this Timestamp object is later;false otherwise |
| before | | public boolean before(Timestamp ts)(Code) | | Indicates whether this Timestamp object is
earlier than the given Timestamp object.
Parameters:
ts - the Timestamp value to compare with true if this Timestamp object is earlier;false otherwise |
| compareTo | | public int compareTo(Timestamp ts)(Code) | | Compares this Timestamp object to the given
Timestamp object.
Parameters:
ts - the Timestamp object to be compared tothis Timestamp object the value 0 if the two Timestampobjects 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.
since:
1.4 |
| compareTo | | public int compareTo(java.util.Date o)(Code) | | Compares this Timestamp object to the given
Date, which must be a Timestamp
object. If the argument is not a Timestamp object,
this method throws a ClassCastException object.
(Timestamp objects are
comparable only to other Timestamp objects.)
Parameters:
o - the Date to be compared, which must be aTimestamp object the value 0 if this Timestamp objectand 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.
since:
1.5 |
| equals | | public boolean equals(Timestamp ts)(Code) | | Tests to see if this Timestamp object is
equal to the given Timestamp object.
Parameters:
ts - the Timestamp value to compare with true if the given Timestampobject is equal to this Timestamp object;false otherwise |
| equals | | public boolean equals(java.lang.Object ts)(Code) | | Tests to see if this 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.
Parameters:
ts - the Object value to compare with true if the given Object is an instanceof a Timestamp thatis equal to this Timestamp object;false otherwise |
| getNanos | | public int getNanos()(Code) | | Gets this Timestamp object's nanos value.
this Timestamp object's fractional seconds component
See Also: Timestamp.setNanos |
| getTime | | public long getTime()(Code) | | Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT
represented by this Timestamp object.
the number of milliseconds since January 1, 1970, 00:00:00 GMTrepresented by this date.
See Also: Timestamp.setTime |
| setNanos | | public void setNanos(int n)(Code) | | Sets this Timestamp object's nanos field
to the given value.
Parameters:
n - the new fractional seconds component
exception:
java.lang.IllegalArgumentException - if the given argumentis greater than 999999999 or less than 0
See Also: Timestamp.getNanos |
| toString | | public String toString()(Code) | | Formats a timestamp in JDBC timestamp escape format.
yyyy-mm-dd hh:mm:ss.fffffffff,
where ffffffffff indicates nanoseconds.
a String object inyyyy-mm-dd hh:mm:ss.fffffffff format |
| valueOf | | public static Timestamp valueOf(String s)(Code) | | Converts a String object in JDBC timestamp escape format to a
Timestamp value.
Parameters:
s - timestamp in format yyyy-mm-dd hh:mm:ss[.f...]. Thefractional seconds may be omitted. corresponding Timestamp value
exception:
java.lang.IllegalArgumentException - if the given argumentdoes not have the format yyyy-mm-dd hh:mm:ss[.f...] |
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