org.jfree.date
public class SpreadsheetDate extends SerialDate
Be aware that there is a deliberate bug in Excel that recognises the year 1900 as a leap year when in fact it is not a leap year. You can find more information on the Microsoft website in article Q181370:
http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
Excel uses the convention that 1-Jan-1900 = 1. This class uses the convention 1-Jan-1900 = 2. The result is that the day number in this class will be different to the Excel figure for January and February 1900...but then Excel adds in an extra day (29-Feb-1900 which does not actually exist!) and from that point forward the day numbers will match.
Constructor Summary | |
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SpreadsheetDate(int day, int month, int year)
Creates a new date instance.
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SpreadsheetDate(int serial)
Standard constructor - creates a new date object representing the
specified day number (which should be in the range 2 to 2958465.
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Method Summary | |
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int | compare(SerialDate other)
Returns the difference (in days) between this date and the specified
'other' date.
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int | compareTo(Object other)
Implements the method required by the Comparable interface.
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boolean | equals(Object object)
Tests the equality of this date with an arbitrary object.
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int | getDayOfMonth()
Returns the day of the month.
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int | getDayOfWeek()
Returns a code representing the day of the week.
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int | getMonth()
Returns the month (January = 1, February = 2, March = 3).
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int | getYYYY()
Returns the year (assume a valid range of 1900 to 9999).
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int | hashCode()
Returns a hash code for this object instance.
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boolean | isAfter(SerialDate other)
Returns true if this SerialDate represents the same date as the
specified SerialDate.
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boolean | isBefore(SerialDate other)
Returns true if this SerialDate represents an earlier date compared to
the specified SerialDate.
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boolean | isInRange(SerialDate d1, SerialDate d2)
Returns true if this SerialDate is within the
specified range (INCLUSIVE). |
boolean | isInRange(SerialDate d1, SerialDate d2, int include)
Returns true if this SerialDate is within the specified range (caller
specifies whether or not the end-points are included). |
boolean | isOn(SerialDate other)
Returns true if this SerialDate represents the same date as the
specified SerialDate.
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boolean | isOnOrAfter(SerialDate other)
Returns true if this SerialDate represents the same date as the
specified SerialDate.
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boolean | isOnOrBefore(SerialDate other)
Returns true if this SerialDate represents the same date as the
specified SerialDate.
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Date | toDate()
Returns a java.util.Date equivalent to this date.
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int | toSerial()
Returns the serial number for the date, where 1 January 1900 = 2
(this corresponds, almost, to the numbering system used in Microsoft
Excel for Windows and Lotus 1-2-3).
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Parameters: day the day (in the range 1 to 28/29/30/31). month the month (in the range 1 to 12). year the year (in the range 1900 to 9999).
Parameters: serial the serial number for the day (range: 2 to 2958465).
Parameters: other the date being compared to.
Returns: The difference (in days) between this date and the specified 'other' date.
Parameters: other the other object (usually another SerialDate).
Returns: A negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.
This method will return true ONLY if the object is an instance of the SerialDate base class, and it represents the same day as this SpreadsheetDate.
Parameters: object the object to compare (null
permitted).
Returns: A boolean.
Returns: The day of the month.
The codes are defined in the SerialDate class as:
SUNDAY
, MONDAY
, TUESDAY
,
WEDNESDAY
, THURSDAY
, FRIDAY
, and
SATURDAY
.
Returns: A code representing the day of the week.
Returns: The month of the year.
Returns: The year.
Returns: A hash code.
Parameters: other the date being compared to.
Returns: true
if this SerialDate represents the same date
as the specified SerialDate.
Parameters: other the date being compared to.
Returns: true
if this SerialDate represents an earlier date
compared to the specified SerialDate.
true
if this SerialDate is within the
specified range (INCLUSIVE). The date order of d1 and d2 is not
important.
Parameters: d1 a boundary date for the range. d2 the other boundary date for the range.
Returns: A boolean.
Parameters: d1 one boundary date for the range. d2 a second boundary date for the range. include a code that controls whether or not the start and end dates are included in the range.
Returns: true
if this SerialDate is within the specified
range.
Parameters: other the date being compared to.
Returns: true
if this SerialDate represents the same date as
the specified SerialDate.
Parameters: other the date being compared to.
Returns: true
if this SerialDate represents the same date as
the specified SerialDate.
Parameters: other the date being compared to.
Returns: true
if this SerialDate represents the same date
as the specified SerialDate.
java.util.Date
equivalent to this date.
Returns: The date.
Returns: The serial number of this date.