org.jfree.data.time

Class SimpleTimePeriod

java.lang.Object

org.jfree.data.time.SimpleTimePeriod

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable, TimePeriod

public class SimpleTimePeriod
extends java.lang.Object
implements TimePeriod, java.lang.Comparable, java.io.Serializable

An arbitrary period of time, measured to millisecond precision using java.util.Date.

This class is intentionally immutable (that is, once constructed, you cannot alter the start and end attributes).

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private long	end The end date/time.
private static long	serialVersionUID For serialization.
private long	start The start date/time.

Constructor Summary

Constructors

Constructor and Description
SimpleTimePeriod(java.util.Date start, java.util.Date end) Creates a new time allocation.
SimpleTimePeriod(long start, long end) Creates a new time allocation.

Method Summary

Modifier and Type	Method and Description
int	compareTo(java.lang.Object obj) Returns an integer that indicates the relative ordering of two time periods.
boolean	equals(java.lang.Object obj) Tests this time period instance for equality with an arbitrary object.
java.util.Date	getEnd() Returns the end date/time.
long	getEndMillis() Returns the end date/time in milliseconds.
java.util.Date	getStart() Returns the start date/time.
long	getStartMillis() Returns the start date/time in milliseconds.
int	hashCode() Returns a hash code for this object instance.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

For serialization.

See Also:

Constant Field Values

start

private long start

The start date/time.

end

private long end

The end date/time.

Constructor Detail

SimpleTimePeriod

public SimpleTimePeriod(long start,
                        long end)

Creates a new time allocation.

Parameters:

start - the start date/time in milliseconds.

end - the end date/time in milliseconds.

SimpleTimePeriod

public SimpleTimePeriod(java.util.Date start,
                        java.util.Date end)

Creates a new time allocation.

Parameters:

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

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

Method Detail

getStart

public java.util.Date getStart()

Returns the start date/time.

Specified by:

getStart in interface TimePeriod

Returns:

The start date/time (never null).

getStartMillis

public long getStartMillis()

Returns the start date/time in milliseconds.

Returns:

The start.

Since:

1.0.10.

getEnd

public java.util.Date getEnd()

Returns the end date/time.

Specified by:

getEnd in interface TimePeriod

Returns:

The end date/time (never null).

getEndMillis

public long getEndMillis()

Returns the end date/time in milliseconds.

Returns:

The end.

Since:

1.0.10.

equals

public boolean equals(java.lang.Object obj)

Tests this time period instance for equality with an arbitrary object. The object is considered equal if it is an instance of TimePeriod and it has the same start and end dates.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the other object (null permitted).

Returns:

A boolean.

compareTo

public int compareTo(java.lang.Object obj)

Returns an integer that indicates the relative ordering of two time periods.

Specified by:

compareTo in interface java.lang.Comparable

Parameters:

obj - the object (null not permitted).

Returns:

An integer.

Throws:

java.lang.ClassCastException - if obj is not an instance of TimePeriod.

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 - see:

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

Overrides:

hashCode in class java.lang.Object

Returns:

A hash code.