Timestamp

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.

Public Constructor Summary

Timestamp(int year, int month, int date, int hour, int minute, int second, int nano)
This constructor was deprecated. instead use the constructor Timestamp(long millis)
Timestamp(long time)
Constructs a Timestamp object using a milliseconds time value.

Public Method Summary

boolean
after(Timestamp ts)
Indicates whether this Timestamp object is later than the given Timestamp object.
boolean
before(Timestamp ts)
Indicates whether this Timestamp object is earlier than the given Timestamp object.
int
compareTo(Date o)
Compares this Timestamp object to the given Date object.
int
compareTo(Timestamp ts)
Compares this Timestamp object to the given Timestamp object.
boolean
equals(Timestamp ts)
Tests to see if this Timestamp object is equal to the given Timestamp object.
boolean
equals(Object ts)
Tests to see if this Timestamp object is equal to the given 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. The hashCode method uses the underlying java.util.Date implementation and therefore does not include nanos in its computation.
void
setNanos(int n)
Sets this Timestamp object's nanos field to the given value.
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.
String
toString()
Formats a timestamp in JDBC timestamp escape format.
static Timestamp
valueOf(String s)
Converts a String object in JDBC timestamp escape format to a Timestamp value.

Inherited Method Summary