org.jfree.data.general

Class DefaultValueDataset

java.lang.Object

org.jfree.data.general.AbstractDataset

org.jfree.data.general.DefaultValueDataset

All Implemented Interfaces:

ObjectInputValidation, Serializable, Cloneable, Dataset, ValueDataset, Value, org.jfree.util.PublicCloneable

public class DefaultValueDataset
extends AbstractDataset
implements ValueDataset, Cloneable, org.jfree.util.PublicCloneable, Serializable

A dataset that stores a single value (that is possibly null). This class provides a default implementation of the ValueDataset interface.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DefaultValueDataset() Constructs a new dataset, initially empty.
DefaultValueDataset(double value) Creates a new dataset with the specified value.
DefaultValueDataset(Number value) Creates a new dataset with the specified value.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj) Tests this dataset for equality with an arbitrary object.
Number	getValue() Returns the value.
int	hashCode() Returns a hash code.
void	setValue(Number value) Sets the value and sends a DatasetChangeEvent to all registered listeners.

Methods inherited from class org.jfree.data.general.AbstractDataset

addChangeListener, clone, getGroup, getNotify, hasListener, removeChangeListener, setGroup, setNotify, validateObject

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jfree.data.general.Dataset

addChangeListener, getGroup, removeChangeListener, setGroup

Methods inherited from interface org.jfree.util.PublicCloneable

clone

Constructor Detail

DefaultValueDataset

public DefaultValueDataset()

Constructs a new dataset, initially empty.

DefaultValueDataset

public DefaultValueDataset(double value)

Creates a new dataset with the specified value.

Parameters:

value - the value.

DefaultValueDataset

public DefaultValueDataset(Number value)

Creates a new dataset with the specified value.

Parameters:

value - the initial value (null permitted).

Method Detail

getValue

public Number getValue()

Returns the value.

Specified by:

getValue in interface Value

Returns:

The value (possibly null).

setValue

public void setValue(Number value)

Sets the value and sends a DatasetChangeEvent to all registered listeners.

Parameters:

value - the new value (null permitted).

equals

public boolean equals(Object obj)

Tests this dataset for equality with an arbitrary object.

Overrides:

equals in class Object

Parameters:

obj - the object (null permitted).

Returns:

A boolean.

hashCode

public int hashCode()

Returns a hash code.

Overrides:

hashCode in class Object

Returns:

A hash code.