Date (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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java.sql
Class Date

java.lang.Object
  |
  +--java.util.Date
        |
        +--java.sql.Date

All Implemented Interfaces:: Cloneable, Comparable, Serializable

public class Date
extends Date

A thin wrapper around a millisecond value that allows JDBC to identify this as an SQL DATE value. A milliseconds value represents the number of milliseconds that have passed since January 1, 1970 00:00:00.000 GMT.

To conform with the definition of SQL DATE, the millisecond values wrapped by a java.sql.Date instance must be 'normalized' by setting the hours, minutes, seconds, and milliseconds to zero in the particular time zone with which the instance is associated.

See Also:: Serialized Form

Constructor Summary

Date(int year, int month, int day)
          Deprecated. instead use the constructor Date(long date)

Date(long date)
          Constructs a Date object using the given milliseconds time value.

Method Summary

int getHours()
          Deprecated.

int getMinutes()
          Deprecated.

int getSeconds()
          Deprecated.

void setHours(int i)
          Deprecated.

void setMinutes(int i)
          Deprecated.

void setSeconds(int i)
          Deprecated.

void setTime(long date)
          Sets an existing Date object using the given milliseconds time value.

String toString()
          Formats a date in the date escape format yyyy-mm-dd.

static Date valueOf(String s)
          Converts a string in JDBC date escape format to a Date value.

Methods inherited from class java.util.Date

after, before, clone, compareTo, compareTo, equals, getDate, getDay, getMonth, getTime, getTimezoneOffset, getYear, hashCode, parse, setDate, setMonth, setYear, toGMTString, toLocaleString, UTC

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Date

public Date(int year,
            int month,
            int day)

Deprecated. instead use the constructor Date(long date)

Constructs a Date object initialized with the given year, month, and day.

The result is undefined if a given argument is out of bounds.

Parameters:

year - the year minus 1900; must be 0 to 8099. (Note that 8099 is 9999 minus 1900.)

month - 0 to 11

day - 1 to 31

Date

public Date(long date)

Constructs a Date object using the given milliseconds time value. If the given milliseconds value contains time information, the driver will set the time components to the time in the default time zone (the time zone of the Java virtual machine running the application) that corresponds to zero GMT.
Parameters:: date - milliseconds since January 1, 1970, 00:00:00 GMT not to exceed the milliseconds representation for the year 8099. A negative number indicates the number of milliseconds before January 1, 1970, 00:00:00 GMT.

Method Detail

setTime

public void setTime(long date)

Sets an existing Date object using the given milliseconds time value. If the given milliseconds value contains time information, the driver will set the time components to the time in the default time zone (the time zone of the Java virtual machine running the application) that corresponds to zero GMT.

Overrides:: setTime in class Date

Parameters:: date - milliseconds since January 1, 1970, 00:00:00 GMT not to exceed the milliseconds representation for the year 8099. A negative number indicates the number of milliseconds before January 1, 1970, 00:00:00 GMT.

valueOf

public static Date valueOf(String s)

Converts a string in JDBC date escape format to a Date value.

Parameters:: s - date in format "yyyy-mm-dd"
Returns:: a java.sql.Date object representing the given date

toString

public String toString()

Formats a date in the date escape format yyyy-mm-dd.

NOTE: To specify a date format for the class SimpleDateFormat, use "yyyy.MM.dd" rather than "yyyy-mm-dd". In the context of SimpleDateFormat, "mm" indicates minutes rather than the month. For example:


  Format Pattern                         Result
  --------------                         -------
	"yyyy.MM.dd G 'at' hh:mm:ss z"    ->>  1996.07.10 AD at 15:08:56 PDT

Overrides:: toString in class Date

Returns:: a String in yyyy-mm-dd format
See Also:: Date.toLocaleString(), Date.toGMTString()