Package org.jfree.data.time

Class Second

java.lang.Object

org.jfree.data.time.RegularTimePeriod

org.jfree.data.time.Second

All Implemented Interfaces:

Serializable, Comparable, MonthConstants, TimePeriod

public class Second
extends RegularTimePeriod
implements Serializable

Represents a second in a particular day. 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_SECOND_IN_MINUTE	Useful constant for the first second in a minute.
static final int	LAST_SECOND_IN_MINUTE	Useful constant for the last second in a minute.

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

Method Summary

Modifier and Type	Method	Description
int	compareTo(Object o1)	Returns an integer indicating the order of this Second 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.
long	getFirstMillisecond()	Returns the first millisecond of the second.
long	getFirstMillisecond(Calendar calendar)	Returns the first millisecond of the minute.
long	getLastMillisecond()	Returns the last millisecond of the second.
long	getLastMillisecond(Calendar calendar)	Returns the last millisecond of the second.
Minute	getMinute()	Returns the minute.
int	getSecond()	Returns the second within 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 second following this one.
static Second	parseSecond(String s)	Creates a new 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 second 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_SECOND_IN_MINUTE

public static final int FIRST_SECOND_IN_MINUTE

Useful constant for the first second in a minute.

See Also:

• Constant Field Values

LAST_SECOND_IN_MINUTE

public static final int LAST_SECOND_IN_MINUTE

Useful constant for the last second in a minute.

See Also:

• Constant Field Values

Constructor Details

Second

public Second()

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

Second

public Second(int second,
 Minute minute)

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

Parameters:

second - the second (0 to 59).

minute - the minute (null not permitted).

Second

public Second(int second,
 int minute,
 int hour,
 int day,
 int month,
 int year)

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

Parameters:

second - the second (0-59).

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).

Second

public Second(Date time)

Constructs a new instance from the specified 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:

• Second(Date, TimeZone, Locale)

Second

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

Creates a new second based on the supplied time and time zone.

Parameters:

time - the time (null not permitted).

zone - the time zone (null not permitted).

locale - the locale (null not permitted).

Second

public Second(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).

Method Details

getSecond

public int getSecond()

Returns the second within the minute.

Returns:

The second (0 - 59).

getMinute

public Minute getMinute()

Returns the minute.

Returns:

The minute (never null).

getFirstMillisecond

public long getFirstMillisecond()

Returns the first millisecond of the second. 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 second.

See Also:

• getLastMillisecond()

getLastMillisecond

public long getLastMillisecond()

Returns the last millisecond of the second. 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 second.

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 second 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 second preceding this one.

next

public RegularTimePeriod next()

Returns the second 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 second 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/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 second.

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 Second object representing the same second as this instance.

Overrides:

equals in class Object

Parameters:

obj - the object to compare (null permitted).

Returns:

true if second and minute 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 Second object relative to the specified object: negative == before, zero == same, positive == after.

Specified by:

compareTo in interface Comparable

Parameters:

o1 - the object to compare.

Returns:

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

parseSecond

public static Second parseSecond(String s)

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

Parameters:

s - the string to parse.

Returns:

The second, or null if the string is not parseable.