Class AbstractTableModel
- java.lang.Object
-
- javax.swing.table.AbstractTableModel
- All Implemented Interfaces:
-
Serializable
,TableModel
- Direct Known Subclasses:
DefaultTableModel
public abstract class AbstractTableModel extends Object implements TableModel, Serializable
This abstract class provides default implementations for most of the methods in the TableModel
interface. It takes care of the management of listeners and provides some conveniences for generating TableModelEvents
and dispatching them to the listeners. To create a concrete TableModel
as a subclass of AbstractTableModel
you need only provide implementations for the following three methods:
public int getRowCount(); public int getColumnCount(); public Object getValueAt(int row, int column);
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans
package. Please see XMLEncoder
.
- See Also:
- Serialized Form
Field Summary
Modifier and Type | Field | Description |
---|---|---|
protected EventListenerList | listenerList | List of listeners |
Constructor Summary
Constructor | Description |
---|---|
AbstractTableModel() |
Method Summary
Modifier and Type | Method | Description |
---|---|---|
void | addTableModelListener(TableModelListener l) | Adds a listener to the list that's notified each time a change to the data model occurs. |
int | findColumn(String columnName) | Returns a column given its name. |
void | fireTableCellUpdated(int row,
int column) | Notifies all listeners that the value of the cell at |
void | fireTableChanged(TableModelEvent e) | Forwards the given notification event to all |
void | fireTableDataChanged() | Notifies all listeners that all cell values in the table's rows may have changed. |
void | fireTableRowsDeleted(int firstRow,
int lastRow) | Notifies all listeners that rows in the range |
void | fireTableRowsInserted(int firstRow,
int lastRow) | Notifies all listeners that rows in the range |
void | fireTableRowsUpdated(int firstRow,
int lastRow) | Notifies all listeners that rows in the range |
void | fireTableStructureChanged() | Notifies all listeners that the table's structure has changed. |
Class<?> | getColumnClass(int columnIndex) | Returns |
String | getColumnName(int column) | Returns a default name for the column using spreadsheet conventions: A, B, C, ... |
<T extends EventListener> | getListeners(Class<T> listenerType) | Returns an array of all the objects currently registered as |
TableModelListener[] | getTableModelListeners() | Returns an array of all the table model listeners registered on this model. |
boolean | isCellEditable(int rowIndex,
int columnIndex) | Returns false. |
void | removeTableModelListener(TableModelListener l) | Removes a listener from the list that's notified each time a change to the data model occurs. |
void | setValueAt(Object aValue,
int rowIndex,
int columnIndex) | This empty implementation is provided so users don't have to implement this method if their data model is not editable. |
Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods declared in interface javax.swing.table.TableModel
getColumnCount, getRowCount, getValueAt
Field Detail
listenerList
protected EventListenerList listenerList
List of listeners
Constructor Detail
AbstractTableModel
public AbstractTableModel()
Method Detail
getColumnName
public String getColumnName(int column)
Returns a default name for the column using spreadsheet conventions: A, B, C, ... Z, AA, AB, etc. If column
cannot be found, returns an empty string.
- Specified by:
-
getColumnName
in interfaceTableModel
- Parameters:
-
column
- the column being queried - Returns:
- a string containing the default name of
column
findColumn
public int findColumn(String columnName)
Returns a column given its name. Implementation is naive so this should be overridden if this method is to be called often. This method is not in the TableModel
interface and is not used by the JTable
.
- Parameters:
-
columnName
- string containing name of column to be located - Returns:
- the column with
columnName
, or -1 if not found
getColumnClass
public Class<?> getColumnClass(int columnIndex)
Returns Object.class
regardless of columnIndex
.
- Specified by:
-
getColumnClass
in interfaceTableModel
- Parameters:
-
columnIndex
- the column being queried - Returns:
- the Object.class
isCellEditable
public boolean isCellEditable(int rowIndex, int columnIndex)
Returns false. This is the default implementation for all cells.
- Specified by:
-
isCellEditable
in interfaceTableModel
- Parameters:
-
rowIndex
- the row being queried -
columnIndex
- the column being queried - Returns:
- false
- See Also:
TableModel.setValueAt(java.lang.Object, int, int)
setValueAt
public void setValueAt(Object aValue, int rowIndex, int columnIndex)
This empty implementation is provided so users don't have to implement this method if their data model is not editable.
- Specified by:
-
setValueAt
in interfaceTableModel
- Parameters:
-
aValue
- value to assign to cell -
rowIndex
- row of cell -
columnIndex
- column of cell - See Also:
-
TableModel.getValueAt(int, int)
,TableModel.isCellEditable(int, int)
addTableModelListener
public void addTableModelListener(TableModelListener l)
Adds a listener to the list that's notified each time a change to the data model occurs.
- Specified by:
-
addTableModelListener
in interfaceTableModel
- Parameters:
-
l
- the TableModelListener
removeTableModelListener
public void removeTableModelListener(TableModelListener l)
Removes a listener from the list that's notified each time a change to the data model occurs.
- Specified by:
-
removeTableModelListener
in interfaceTableModel
- Parameters:
-
l
- the TableModelListener
getTableModelListeners
public TableModelListener[] getTableModelListeners()
Returns an array of all the table model listeners registered on this model.
- Returns:
- all of this model's
TableModelListener
s or an empty array if no table model listeners are currently registered - Since:
- 1.4
- See Also:
-
addTableModelListener(javax.swing.event.TableModelListener)
,removeTableModelListener(javax.swing.event.TableModelListener)
fireTableDataChanged
public void fireTableDataChanged()
Notifies all listeners that all cell values in the table's rows may have changed. The number of rows may also have changed and the JTable
should redraw the table from scratch. The structure of the table (as in the order of the columns) is assumed to be the same.
fireTableStructureChanged
public void fireTableStructureChanged()
Notifies all listeners that the table's structure has changed. The number of columns in the table, and the names and types of the new columns may be different from the previous state. If the JTable
receives this event and its autoCreateColumnsFromModel
flag is set it discards any table columns that it had and reallocates default columns in the order they appear in the model. This is the same as calling setModel(TableModel)
on the JTable
.
- See Also:
-
TableModelEvent
,EventListenerList
fireTableRowsInserted
public void fireTableRowsInserted(int firstRow, int lastRow)
Notifies all listeners that rows in the range [firstRow, lastRow]
, inclusive, have been inserted.
- Parameters:
-
firstRow
- the first row -
lastRow
- the last row - See Also:
-
TableModelEvent
,EventListenerList
fireTableRowsUpdated
public void fireTableRowsUpdated(int firstRow, int lastRow)
Notifies all listeners that rows in the range [firstRow, lastRow]
, inclusive, have been updated.
- Parameters:
-
firstRow
- the first row -
lastRow
- the last row - See Also:
-
TableModelEvent
,EventListenerList
fireTableRowsDeleted
public void fireTableRowsDeleted(int firstRow, int lastRow)
Notifies all listeners that rows in the range [firstRow, lastRow]
, inclusive, have been deleted.
- Parameters:
-
firstRow
- the first row -
lastRow
- the last row - See Also:
-
TableModelEvent
,EventListenerList
fireTableCellUpdated
public void fireTableCellUpdated(int row, int column)
Notifies all listeners that the value of the cell at [row, column]
has been updated.
- Parameters:
-
row
- row of cell which has been updated -
column
- column of cell which has been updated - See Also:
-
TableModelEvent
,EventListenerList
fireTableChanged
public void fireTableChanged(TableModelEvent e)
Forwards the given notification event to all TableModelListeners
that registered themselves as listeners for this table model.
- Parameters:
-
e
- the event to be forwarded - See Also:
-
addTableModelListener(javax.swing.event.TableModelListener)
,TableModelEvent
,EventListenerList
getListeners
public <T extends EventListener> T[] getListeners(Class<T> listenerType)
Returns an array of all the objects currently registered as FooListener
s upon this AbstractTableModel
. FooListener
s are registered using the addFooListener
method.
You can specify the listenerType
argument with a class literal, such as FooListener.class
. For example, you can query a model m
for its table model listeners with the following code:
TableModelListener[] tmls = (TableModelListener[])(m.getListeners(TableModelListener.class));If no such listeners exist, this method returns an empty array.
- Type Parameters:
-
T
- the listener type - Parameters:
-
listenerType
- the type of listeners requested - Returns:
- an array of all objects registered as
FooListener
s on this component, or an empty array if no such listeners have been added - Throws:
-
ClassCastException
- iflistenerType
doesn't specify a class or interface that implementsjava.util.EventListener
- Since:
- 1.3
- See Also:
getTableModelListeners()