java.lang.Object
- org.jfree.data.general.AbstractDataset
- - org.jfree.data.general.DefaultPieDataset

All Implemented Interfaces:

java.io.ObjectInputValidation, java.io.Serializable, java.lang.Cloneable, Dataset, PieDataset, KeyedValues, Values, org.jfree.util.PublicCloneable

Direct Known Subclasses:

DefaultKeyedValuesDataset, JDBCPieDataset
```
public class DefaultPieDataset
extends AbstractDataset
implements PieDataset, java.lang.Cloneable, org.jfree.util.PublicCloneable, java.io.Serializable
```
A default implementation of the PieDataset interface.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`DefaultPieDataset()`	Constructs a new dataset, initially empty.
`DefaultPieDataset(KeyedValues data)`	Creates a new dataset by copying data from a `KeyedValues` instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`	Clears all data from this dataset and sends a `DatasetChangeEvent` to all registered listeners (unless the dataset was already empty).
`java.lang.Object`	`clone()`	Returns a clone of the dataset.
`boolean`	`equals(java.lang.Object obj)`	Tests if this object is equal to another.
`int`	`getIndex(java.lang.Comparable key)`	Returns the index for a key, or -1 if the key is not recognised.
`int`	`getItemCount()`	Returns the number of items in the dataset.
`java.lang.Comparable`	`getKey(int item)`	Returns the key for the specified item, or `null`.
`java.util.List`	`getKeys()`	Returns the categories in the dataset.
`java.lang.Number`	`getValue(int item)`	Returns a value.
`java.lang.Number`	`getValue(java.lang.Comparable key)`	Returns the data value associated with a key.
`int`	`hashCode()`	Returns a hash code.
`void`	`insertValue(int position, java.lang.Comparable key, double value)`	Inserts a new value at the specified position in the dataset or, if there is an existing item with the specified key, updates the value for that item and moves it to the specified position.
`void`	`insertValue(int position, java.lang.Comparable key, java.lang.Number value)`	Inserts a new value at the specified position in the dataset or, if there is an existing item with the specified key, updates the value for that item and moves it to the specified position.
`void`	`remove(java.lang.Comparable key)`	Removes an item from the dataset and sends a `DatasetChangeEvent` to all registered listeners.
`void`	`setValue(java.lang.Comparable key, double value)`	Sets the data value for a key and sends a `DatasetChangeEvent` to all registered listeners.
`void`	`setValue(java.lang.Comparable key, java.lang.Number value)`	Sets the data value for a key and sends a `DatasetChangeEvent` to all registered listeners.
`void`	`sortByKeys(org.jfree.util.SortOrder order)`	Sorts the dataset's items by key and sends a `DatasetChangeEvent` to all registered listeners.
`void`	`sortByValues(org.jfree.util.SortOrder order)`	Sorts the dataset's items by value and sends a `DatasetChangeEvent` to all registered listeners.

Methods inherited from class org.jfree.data.general.AbstractDataset
addChangeListener, fireDatasetChanged, getGroup, getNotify, hasListener, notifyListeners, removeChangeListener, setGroup, setNotify, 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
  - DefaultPieDataset
```
public DefaultPieDataset()
```
    Constructs a new dataset, initially empty.
  - DefaultPieDataset
```
public DefaultPieDataset(KeyedValues data)
```
    Creates a new dataset by copying data from a KeyedValues instance.
    
    Parameters:
    
    data - the data (null not permitted).
- Method Detail
  - getItemCount
```
public int getItemCount()
```
    Returns the number of items in the dataset.
    
    Specified by:
    
    getItemCount in interface Values
    
    Returns:
    
    The item count.
  - getKeys
```
public java.util.List getKeys()
```
    Returns the categories in the dataset. The returned list is unmodifiable.
    
    Specified by:
    
    getKeys in interface KeyedValues
    
    Returns:
    
    The categories in the dataset.
  - getKey
```
public java.lang.Comparable getKey(int item)
```
    Returns the key for the specified item, or null.
    
    Specified by:
    
    getKey in interface KeyedValues
    
    Parameters:
    
    item - the item index (in the range 0 to getItemCount() - 1).
    
    Returns:
    
    The key, or null.
    
    Throws:
    
    java.lang.IndexOutOfBoundsException - if item is not in the specified range.
  - getIndex
```
public int getIndex(java.lang.Comparable key)
```
    Returns the index for a key, or -1 if the key is not recognised.
    
    Specified by:
    
    getIndex in interface KeyedValues
    
    Parameters:
    
    key - the key (null not permitted).
    
    Returns:
    
    The index, or -1 if the key is unrecognised.
    
    Throws:
    
    java.lang.IllegalArgumentException - if key is null.
  - getValue
```
public java.lang.Number getValue(int item)
```
    Returns a value.
    
    Specified by:
    
    getValue in interface Values
    
    Parameters:
    
    item - the value index.
    
    Returns:
    
    The value (possibly null).
  - getValue
```
public java.lang.Number getValue(java.lang.Comparable key)
```
    Returns the data value associated with a key.
    
    Specified by:
    
    getValue in interface KeyedValues
    
    Parameters:
    
    key - the key (null not permitted).
    
    Returns:
    
    The value (possibly null).
    
    Throws:
    
    UnknownKeyException - if the key is not recognised.
  - setValue
```
public void setValue(java.lang.Comparable key,
                     java.lang.Number value)
```
    Sets the data value for a key and sends a DatasetChangeEvent to all registered listeners.
    
    Parameters:
    
    key - the key (null not permitted).
    
    value - the value.
    
    Throws:
    
    java.lang.IllegalArgumentException - if key is null.
  - setValue
```
public void setValue(java.lang.Comparable key,
                     double value)
```
    Sets the data value for a key and sends a DatasetChangeEvent to all registered listeners.
    
    Parameters:
    
    key - the key (null not permitted).
    
    value - the value.
    
    Throws:
    
    java.lang.IllegalArgumentException - if key is null.
  - insertValue
```
public void insertValue(int position,
                        java.lang.Comparable key,
                        double value)
```
    Inserts a new value at the specified position in the dataset or, if there is an existing item with the specified key, updates the value for that item and moves it to the specified position. After the change is made, this methods sends a DatasetChangeEvent to all registered listeners.
    
    Parameters:
    
    position - the position (in the range 0 to getItemCount()).
    
    key - the key (null not permitted).
    
    value - the value (null permitted).
    
    Since:
    
    1.0.6
  - insertValue
```
public void insertValue(int position,
                        java.lang.Comparable key,
                        java.lang.Number value)
```
    Inserts a new value at the specified position in the dataset or, if there is an existing item with the specified key, updates the value for that item and moves it to the specified position. After the change is made, this methods sends a DatasetChangeEvent to all registered listeners.
    
    Parameters:
    
    position - the position (in the range 0 to getItemCount()).
    
    key - the key (null not permitted).
    
    value - the value (null permitted).
    
    Since:
    
    1.0.6
  - remove
```
public void remove(java.lang.Comparable key)
```
    Removes an item from the dataset and sends a DatasetChangeEvent to all registered listeners.
    
    Parameters:
    
    key - the key (null not permitted).
    
    Throws:
    
    java.lang.IllegalArgumentException - if key is null.
  - clear
```
public void clear()
```
    Clears all data from this dataset and sends a DatasetChangeEvent to all registered listeners (unless the dataset was already empty).
    
    Since:
    
    1.0.2
  - sortByKeys
```
public void sortByKeys(org.jfree.util.SortOrder order)
```
    Sorts the dataset's items by key and sends a DatasetChangeEvent to all registered listeners.
    
    Parameters:
    
    order - the sort order (null not permitted).
    
    Since:
    
    1.0.3
  - sortByValues
```
public void sortByValues(org.jfree.util.SortOrder order)
```
    Sorts the dataset's items by value and sends a DatasetChangeEvent to all registered listeners.
    
    Parameters:
    
    order - the sort order (null not permitted).
    
    Since:
    
    1.0.3
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Tests if this object is equal to another.
    
    Overrides:
    
    equals in class java.lang.Object
    
    Parameters:
    
    obj - the other object.
    
    Returns:
    
    A boolean.
  - hashCode
```
public int hashCode()
```
    Returns a hash code.
    
    Overrides:
    
    hashCode in class java.lang.Object
    
    Returns:
    
    A hash code.
  - clone
```
public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
```
    Returns a clone of the dataset.
    
    Specified by:
    
    clone in interface org.jfree.util.PublicCloneable
    
    Overrides:
    
    clone in class AbstractDataset
    
    Returns:
    
    A clone.
    
    Throws:
    
    java.lang.CloneNotSupportedException - This class will not throw this exception, but subclasses (if any) might.

Class DefaultPieDataset

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultPieDataset

DefaultPieDataset

Method Detail

getItemCount

getKeys

getKey

getIndex

getValue

getValue

setValue

setValue

insertValue

insertValue

remove

clear

sortByKeys

sortByValues

equals

hashCode

clone