# Class TableModelEvent

java.lang.Object
java.util.EventObject
javax.swing.event.TableModelEvent

All Implemented Interfaces:
  `Serializable`

public class TableModelEvent extends EventObject
TableModelEvent is used to notify listeners that a table model has changed. The model event describes changes to a TableModel and all references to rows and columns are in the coordinate system of the model. Depending on the parameters used in the constructors, the TableModelevent can be used to specify the following types of changes:

    TableModelEvent(source);              //  The data, ie. all rows changed
    TableModelEvent(source, HEADER_ROW);  //  Structure change, reallocate TableColumns
    TableModelEvent(source, 1);           //  Row 1 changed
    TableModelEvent(source, 3, 6);        //  Rows 3 to 6 inclusive changed
    TableModelEvent(source, 2, 2, 6);     //  Cell at (2, 6) changed
    TableModelEvent(source, 3, 6, ALL_COLUMNS, INSERT); // Rows (3, 6) were inserted
    TableModelEvent(source, 3, 6, ALL_COLUMNS, DELETE); // Rows (3, 6) were deleted

It is possible to use other combinations of the parameters, not all of them are meaningful. By subclassing, you can add other information, for example: whether the event WILL happen or DID happen. This makes the specification of rows in DELETE events more useful but has not been included in the swing package as the JTable only needs post-event notification.

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:
  - `TableModel`

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final int`
  `ALL_COLUMNS`
  Specifies all columns in a row or rows.
  `protected int`
  `column`
  The column for the event.
  `static final int`
  `DELETE`
  Identifies the removal of rows or columns.
  `protected int`
  `firstRow`
  The first row that has changed.
  `static final int`
  `HEADER_ROW`
  Identifies the header row.
  `static final int`
  `INSERT`
  Identifies the addition of new rows or columns.
  `protected int`
  `lastRow`
  The last row that has changed.
  `protected int`
  `type`
  The type of the event.
  `static final int`
  `UPDATE`
  Identifies a change to existing data.

  ### Fields declared in class EventObject

  `source`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `TableModelEvent(TableModel source)`
  All row data in the table has changed, listeners should discard any state that was based on the rows and requery the `TableModel` to get the new row count and all the appropriate values.
  `TableModelEvent(TableModel source, int row)`
  This row of data has been updated.
  `TableModelEvent(TableModel source, int firstRow, int lastRow)`
  The data in rows [firstRow, lastRow] have been updated.
  `TableModelEvent(TableModel source, int firstRow, int lastRow, int column)`
  The cells in column column in the range [firstRow, lastRow] have been updated.
  `TableModelEvent(TableModel source, int firstRow, int lastRow, int column, int type)`
  The cells from (firstRow, column) to (lastRow, column) have been changed.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `int`
  `getColumn()`
  Returns the column for the event.
  `int`
  `getFirstRow()`
  Returns the first row that changed.
  `int`
  `getLastRow()`
  Returns the last row that changed.
  `int`
  `getType()`
  Returns the type of event - one of: INSERT, UPDATE and DELETE.

  ### Methods declared in class EventObject

  `getSource, toString`

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Field Details

  - ### INSERT

    public static final int INSERT
    Identifies the addition of new rows or columns.
    See Also:
      - Constant Field Values

  - ### UPDATE

    public static final int UPDATE
    Identifies a change to existing data.
    See Also:
      - Constant Field Values

  - ### DELETE

    public static final int DELETE
    Identifies the removal of rows or columns.
    See Also:
      - Constant Field Values

  - ### HEADER_ROW

    public static final int HEADER_ROW
    Identifies the header row.
    See Also:
      - Constant Field Values

  - ### ALL_COLUMNS

    public static final int ALL_COLUMNS
    Specifies all columns in a row or rows.
    See Also:
      - Constant Field Values

  - ### type

    protected int type
    The type of the event.

  - ### firstRow

    protected int firstRow
    The first row that has changed.

  - ### lastRow

    protected int lastRow
    The last row that has changed.

  - ### column

    protected int column
    The column for the event.

- ## Constructor Details

  - ### TableModelEvent

    public TableModelEvent(TableModel source)
    All row data in the table has changed, listeners should discard any state that was based on the rows and requery the `TableModel` to get the new row count and all the appropriate values. The `JTable` will repaint the entire visible region on receiving this event, querying the model for the cell values that are visible. The structure of the table ie, the column names, types and order have not changed.
    Parameters:
      `source` - the `TableModel` affected by this event

  - ### TableModelEvent

    public TableModelEvent(TableModel source, int row)
    This row of data has been updated. To denote the arrival of a completely new table with a different structure use `HEADER_ROW` as the value for the `row`. When the `JTable` receives this event and its `autoCreateColumnsFromModel` flag is set it discards any TableColumns that it had and reallocates default ones in the order they appear in the model. This is the same as calling `setModel(TableModel)` on the `JTable`.
    Parameters:
      `source` - the `TableModel` affected by this event
      `row` - the row which has been updated

  - ### TableModelEvent

    public TableModelEvent(TableModel source, int firstRow, int lastRow)
    The data in rows [firstRow, lastRow] have been updated.
    Parameters:
      `source` - the `TableModel` affected by this event
      `firstRow` - the first row affected by this event
      `lastRow` - the last row affected by this event

  - ### TableModelEvent

    public TableModelEvent(TableModel source, int firstRow, int lastRow, int column)
    The cells in column column in the range [firstRow, lastRow] have been updated.
    Parameters:
      `source` - the `TableModel` affected by this event
      `firstRow` - the first row affected by this event
      `lastRow` - the last row affected by this event
      `column` - the column index of cells changed; `ALL_COLUMNS` signifies all cells in the specified range of rows are changed.

  - ### TableModelEvent

    public TableModelEvent(TableModel source, int firstRow, int lastRow, int column, int type)
    The cells from (firstRow, column) to (lastRow, column) have been changed. The column refers to the column index of the cell in the model's coordinate system. When column is ALL_COLUMNS, all cells in the specified range of rows are considered changed.

    The type should be one of: INSERT, UPDATE and DELETE.

    Parameters:
      `source` - the `TableModel` affected by this event
      `firstRow` - the first row affected by this event
      `lastRow` - the last row affected by this event
      `column` - the column index of cells changed; `ALL_COLUMNS` signifies all cells in the specified range of rows are changed.
      `type` - the type of change signified by this even, `INSERT`, `DELETE` or `UPDATE`

- ## Method Details

  - ### getFirstRow

    public int getFirstRow()
    Returns the first row that changed. HEADER_ROW means the meta data, ie. names, types and order of the columns.
    Returns:
      an integer signifying the first row changed

  - ### getLastRow

    public int getLastRow()
    Returns the last row that changed.
    Returns:
      an integer signifying the last row changed

  - ### getColumn

    public int getColumn()
    Returns the column for the event. If the return value is ALL_COLUMNS; it means every column in the specified rows changed.
    Returns:
      an integer signifying which column is affected by this event

  - ### getType

    public int getType()
    Returns the type of event - one of: INSERT, UPDATE and DELETE.
    Returns:
      the type of change to a table model, an `INSERT` or `DELETE` of row(s) or column(s) or `UPDATE` to data