Package org.jfree.data.time

Class Minute

java.lang.Object

org.jfree.data.time.RegularTimePeriod

org.jfree.data.time.Minute

All Implemented Interfaces:

Serializable, Comparable, MonthConstants, TimePeriod

public class Minute
extends RegularTimePeriod
implements Serializable

Represents a minute. This class is immutable, which is a requirement for all RegularTimePeriod subclasses.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final int	FIRST_MINUTE_IN_HOUR	Useful constant for the first minute in a day.
static final int	LAST_MINUTE_IN_HOUR	Useful constant for the last minute in a day.

Fields inherited from interface org.jfree.chart.date.MonthConstants

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

Constructor Summary

Constructors

Constructor	Description
Minute()	Constructs a new Minute, based on the system date/time.
Minute(int minute, int hour, int day, int month, int year)	Creates a new minute.
Minute(int minute, Hour hour)	Constructs a new Minute.
Minute(Date time)	Constructs a new instance, based on the supplied date/time.
Minute(Date time, Calendar calendar)	Constructs a new instance, based on a particular date/time.
Minute(Date time, TimeZone zone, Locale locale)	Constructs a new Minute, based on the supplied date/time and timezone.

Method Summary

Modifier and Type	Method	Description
int	compareTo(Object o1)	Returns an integer indicating the order of this Minute object relative to the specified object: negative == before, zero == same, positive == after.
boolean	equals(Object obj)	Tests the equality of this object against an arbitrary Object.
Day	getDay()	Returns the day.
long	getFirstMillisecond()	Returns the first millisecond of the minute.
long	getFirstMillisecond(Calendar calendar)	Returns the first millisecond of the minute.
Hour	getHour()	Returns the hour.
int	getHourValue()	Returns the hour.
long	getLastMillisecond()	Returns the last millisecond of the minute.
long	getLastMillisecond(Calendar calendar)	Returns the last millisecond of the minute.
int	getMinute()	Returns the minute.
long	getSerialIndex()	Returns a serial index number for the minute.
int	hashCode()	Returns a hash code for this object instance.
RegularTimePeriod	next()	Returns the minute following this one.
static Minute	parseMinute(String s)	Creates a Minute instance by parsing a string.
void	peg(Calendar calendar)	Recalculates the start date/time and end date/time for this time period relative to the supplied calendar (which incorporates a time zone).
RegularTimePeriod	previous()	Returns the minute preceding this one.

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

createInstance, downsize, getCalendarInstance, getEnd, getMiddleMillisecond, getMiddleMillisecond, getMillisecond, getStart, setCalendarInstancePrototype, setThreadLocalCalendarInstance, toString

Methods inherited from class java.lang.Object

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

Field Details

FIRST_MINUTE_IN_HOUR

public static final int FIRST_MINUTE_IN_HOUR

Useful constant for the first minute in a day.

See Also:

• Constant Field Values

LAST_MINUTE_IN_HOUR

public static final int LAST_MINUTE_IN_HOUR

Useful constant for the last minute in a day.

See Also:

• Constant Field Values

Constructor Details

Minute

public Minute()

Constructs a new Minute, based on the system date/time. The time zone and locale are determined by the calendar returned by RegularTimePeriod.getCalendarInstance().

Minute

public Minute(int minute,
 Hour hour)

Constructs a new Minute. The time zone and locale are determined by the calendar returned by RegularTimePeriod.getCalendarInstance().

Parameters:

minute - the minute (0 to 59).

hour - the hour (null not permitted).

Minute

public Minute(Date time)

Constructs a new instance, based on the supplied date/time. The time zone and locale are determined by the calendar returned by RegularTimePeriod.getCalendarInstance().

Parameters:

time - the time (null not permitted).

See Also:

• Minute(Date, TimeZone, Locale)

Minute

public Minute(Date time,
 TimeZone zone,
 Locale locale)

Constructs a new Minute, based on the supplied date/time and timezone.

Parameters:

time - the time (null not permitted).

zone - the time zone (null not permitted).

locale - the locale (null not permitted).

Minute

public Minute(Date time,
 Calendar calendar)

Constructs a new instance, based on a particular date/time. The time zone and locale are determined by the calendar parameter.

Parameters:

time - the date/time (null not permitted).

calendar - the calendar to use for calculations (null not permitted).

Minute

public Minute(int minute,
 int hour,
 int day,
 int month,
 int year)

Creates a new minute. The time zone and locale are determined by the calendar returned by RegularTimePeriod.getCalendarInstance().

Parameters:

minute - the minute (0-59).

hour - the hour (0-23).

day - the day (1-31).

month - the month (1-12).

year - the year (1900-9999).

Method Details

getDay

public Day getDay()

Returns the day.

Returns:

The day.

getHour

public Hour getHour()

Returns the hour.

Returns:

The hour (never null).

getHourValue

public int getHourValue()

Returns the hour.

Returns:

The hour.

getMinute

public int getMinute()

Returns the minute.

Returns:

The minute.

getFirstMillisecond

public long getFirstMillisecond()

Returns the first millisecond of the minute. This will be determined relative to the time zone specified in the constructor, or in the calendar instance passed in the most recent call to the peg(Calendar) method.

Specified by:

getFirstMillisecond in class RegularTimePeriod

Returns:

The first millisecond of the minute.

See Also:

• getLastMillisecond()

getLastMillisecond

public long getLastMillisecond()

Returns the last millisecond of the minute. This will be determined relative to the time zone specified in the constructor, or in the calendar instance passed in the most recent call to the peg(Calendar) method.

Specified by:

getLastMillisecond in class RegularTimePeriod

Returns:

The last millisecond of the minute.

See Also:

• getFirstMillisecond()

peg

public void peg(Calendar calendar)

Recalculates the start date/time and end date/time for this time period relative to the supplied calendar (which incorporates a time zone).

Specified by:

peg in class RegularTimePeriod

Parameters:

calendar - the calendar (null not permitted).

previous

public RegularTimePeriod previous()

Returns the minute preceding this one. No matter what time zone and locale this instance was created with, the returned instance will use the default calendar for time calculations, obtained with RegularTimePeriod.getCalendarInstance().

Specified by:

previous in class RegularTimePeriod

Returns:

The minute preceding this one.

next

public RegularTimePeriod next()

Returns the minute following this one. No matter what time zone and locale this instance was created with, the returned instance will use the default calendar for time calculations, obtained with RegularTimePeriod.getCalendarInstance().

Specified by:

next in class RegularTimePeriod

Returns:

The minute following this one.

getSerialIndex

public long getSerialIndex()

Returns a serial index number for the minute.

Specified by:

getSerialIndex in class RegularTimePeriod

Returns:

The serial index number.

getFirstMillisecond

public long getFirstMillisecond(Calendar calendar)

Returns the first millisecond of the minute.

Specified by:

getFirstMillisecond in class RegularTimePeriod

Parameters:

calendar - the calendar which defines the timezone (null not permitted).

Returns:

The first millisecond.

Throws:

NullPointerException - if calendar is null.

See Also:

• RegularTimePeriod.getLastMillisecond(Calendar)

getLastMillisecond

public long getLastMillisecond(Calendar calendar)

Returns the last millisecond of the minute.

Specified by:

getLastMillisecond in class RegularTimePeriod

Parameters:

calendar - the calendar / timezone (null not permitted).

Returns:

The last millisecond.

Throws:

NullPointerException - if calendar is null.

See Also:

• RegularTimePeriod.getFirstMillisecond(Calendar)

equals

public boolean equals(Object obj)

Tests the equality of this object against an arbitrary Object.

This method will return true ONLY if the object is a Minute object representing the same minute as this instance.

Overrides:

equals in class Object

Parameters:

obj - the object to compare (null permitted).

Returns:

true if the minute and hour value 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 Object

Returns:

A hash code.

compareTo

public int compareTo(Object o1)

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

Specified by:

compareTo in interface Comparable

Parameters:

o1 - object to compare.

Returns:

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

parseMinute

public static Minute parseMinute(String s)

Creates a Minute instance by parsing a string. The string is assumed to be in the format "YYYY-MM-DD HH:MM", perhaps with leading or trailing whitespace.

Parameters:

s - the minute string to parse.

Returns:

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