org.jfree.data.general
Class DefaultValueDataset

java.lang.Object
  extended byorg.jfree.data.general.AbstractDataset
      extended byorg.jfree.data.general.DefaultValueDataset
All Implemented Interfaces:
java.lang.Cloneable, Dataset, java.io.ObjectInputValidation, java.io.Serializable, Value, ValueDataset

public class DefaultValueDataset
extends AbstractDataset
implements ValueDataset, java.lang.Cloneable, java.io.Serializable

A dataset that stores a single value. This class provides a default implementation of the ValueDataset interface.

See Also:
Serialized Form

Constructor Summary
DefaultValueDataset()
          Constructs a new dataset, initially empty.
DefaultValueDataset(double value)
          Creates a new dataset.
DefaultValueDataset(java.lang.Number value)
          Creates a new dataset.
 
Method Summary
 boolean equals(java.lang.Object obj)
          Tests this dataset for equality with an arbitrary object.
 java.lang.Number getValue()
          Returns the value.
 int hashCode()
          Returns a hash code.
 void setValue(java.lang.Number value)
          Sets the value and sends a DatasetChangeEvent to all registered listeners.
 
Methods inherited from class org.jfree.data.general.AbstractDataset
addChangeListener, clone, fireDatasetChanged, getGroup, notifyListeners, removeChangeListener, setGroup, validateObject
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.jfree.data.general.Dataset
addChangeListener, getGroup, removeChangeListener, setGroup
 

Constructor Detail

DefaultValueDataset

public DefaultValueDataset()
Constructs a new dataset, initially empty.


DefaultValueDataset

public DefaultValueDataset(double value)
Creates a new dataset.

Parameters:
value - the value.

DefaultValueDataset

public DefaultValueDataset(java.lang.Number value)
Creates a new dataset.

Parameters:
value - the initial value.
Method Detail

getValue

public java.lang.Number getValue()
Returns the value.

Specified by:
getValue in interface Value
Returns:
The value (possibly null).

setValue

public void setValue(java.lang.Number value)
Sets the value and sends a DatasetChangeEvent to all registered listeners.

Parameters:
value - the new value (null permitted).

equals

public boolean equals(java.lang.Object obj)
Tests this dataset for equality with an arbitrary object.

Parameters:
obj - the object.
Returns:
A boolean.

hashCode

public int hashCode()
Returns a hash code.

Returns:
A hash code.