org.jfree.data.time
Class Year

java.lang.Object
  org.jfree.data.time.RegularTimePeriod
      org.jfree.data.time.Year

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable, TimePeriod, org.jfree.date.MonthConstants

public class Year
extends RegularTimePeriod
implements java.io.Serializable

Represents a year in the range 1900 to 9999. This class is immutable, which is a requirement for all RegularTimePeriod subclasses.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.jfree.data.time.RegularTimePeriod

DEFAULT_TIME_ZONE, WORKING_CALENDAR

Fields inherited from interface org.jfree.date.MonthConstants

APRIL, AUGUST, DECEMBER, FEBRUARY, JANUARY, JULY, JUNE, MARCH, MAY, NOVEMBER, OCTOBER, SEPTEMBER

Constructor Summary

Year()
Creates a new Year, based on the current system date/time.

Year(java.util.Date time)
Creates a new Year, based on a particular instant in time, using the default time zone.

Year(java.util.Date time, java.util.TimeZone zone)
Constructs a year, based on a particular instant in time and a time zone.

Year(int year)
Creates a time period representing a single year.

Method Summary

int	compareTo(java.lang.Object o1) Returns an integer indicating the order of this Year object relative to the specified object: negative == before, zero == same, positive == after.
boolean	equals(java.lang.Object object) Tests the equality of this Year object to an arbitrary object.
long	getFirstMillisecond(java.util.Calendar calendar) Returns the first millisecond of the year, evaluated using the supplied calendar (which determines the time zone).
long	getLastMillisecond(java.util.Calendar calendar) Returns the last millisecond of the year, evaluated using the supplied calendar (which determines the time zone).
long	getSerialIndex() Returns a serial index number for the year.
int	getYear() Returns the year.
int	hashCode() Returns a hash code for this object instance.
RegularTimePeriod	next() Returns the year following this one.
static Year	parseYear(java.lang.String s) Parses the string argument as a year.
RegularTimePeriod	previous() Returns the year preceding this one.
java.lang.String	toString() Returns a string representing the year..

Methods inherited from class org.jfree.data.time.RegularTimePeriod

createInstance, downsize, getEnd, getFirstMillisecond, getFirstMillisecond, getLastMillisecond, getLastMillisecond, getMiddleMillisecond, getMiddleMillisecond, getMiddleMillisecond, getStart

Methods inherited from class java.lang.Object

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

Constructor Detail

Year

public Year()

Creates a new Year, based on the current system date/time.

Year

public Year(int year)

Creates a time period representing a single year.

Parameters:

year - the year.

Year

public Year(java.util.Date time)

Creates a new Year, based on a particular instant in time, using the default time zone.

Parameters:

time - the time (null not permitted).

Year

public Year(java.util.Date time,
            java.util.TimeZone zone)

Constructs a year, based on a particular instant in time and a time zone.

Parameters:

time - the time.

zone - the time zone.

Method Detail

getYear

public int getYear()

Returns the year.

Returns:

The year.

previous

public RegularTimePeriod previous()

Returns the year preceding this one.

Specified by:

previous in class RegularTimePeriod

Returns:

The year preceding this one (or null if the current year is 1900).

next

public RegularTimePeriod next()

Returns the year following this one.

Specified by:

next in class RegularTimePeriod

Returns:

The year following this one (or null if the current year is 9999).

getSerialIndex

public long getSerialIndex()

Returns a serial index number for the year.

The implementation simply returns the year number (e.g. 2002).

Specified by:

getSerialIndex in class RegularTimePeriod

Returns:

The serial index number.

getFirstMillisecond

public long getFirstMillisecond(java.util.Calendar calendar)

Returns the first millisecond of the year, evaluated using the supplied calendar (which determines the time zone).

Specified by:

getFirstMillisecond in class RegularTimePeriod

Parameters:

calendar - the calendar.

Returns:

The first millisecond of the year.

getLastMillisecond

public long getLastMillisecond(java.util.Calendar calendar)

Returns the last millisecond of the year, evaluated using the supplied calendar (which determines the time zone).

Specified by:

getLastMillisecond in class RegularTimePeriod

Parameters:

calendar - the calendar.

Returns:

The last millisecond of the year.

equals

public boolean equals(java.lang.Object object)

Tests the equality of this Year object to an arbitrary object. Returns true if the target is a Year instance representing the same year as this object. In all other cases, returns false.

Overrides:

equals in class java.lang.Object

Parameters:

object - the object.

Returns:

true if the year of this and the object are the same.

hashCode

public int hashCode()

Returns a hash code for this object instance. The approach described by Joshua Bloch in "Effective Java" has been used here:

http://developer.java.sun.com/developer/Books/effectivejava /Chapter3.pdf

Overrides:

hashCode in class java.lang.Object

Returns:

A hash code.

compareTo

public int compareTo(java.lang.Object o1)

Returns an integer indicating the order of this Year object relative to the specified object: negative == before, zero == same, positive == after.

Specified by:

compareTo in interface java.lang.Comparable

Parameters:

o1 - the object to compare.

Returns:

negative == before, zero == same, positive == after.

toString

public java.lang.String toString()

Returns a string representing the year..

Overrides:

toString in class RegularTimePeriod

Returns:

A string representing the year.

parseYear

public static Year parseYear(java.lang.String s)

Parses the string argument as a year.

The string format is YYYY.

Parameters:

s - a string representing the year.

Returns:

null if the string is not parseable, the year otherwise.