Module java.desktop

Package javax.swing.table

Interface TableModel

All Known Implementing Classes:

AbstractTableModel, DefaultTableModel

public interface TableModel

The TableModel interface specifies the methods the JTable will use to interrogate a tabular data model.

The JTable can be set up to display any data model which implements the TableModel interface with a couple of lines of code:

      TableModel myData = new MyTableModel();
      JTable table = new JTable(myData);
  

For further documentation, see Creating a Table Model in The Java Tutorial.

See Also:

• JTable

Method Summary

Modifier and Type	Method	Description
void	addTableModelListener(TableModelListener l)	Adds a listener to the list that is notified each time a change to the data model occurs.
Class<?>	getColumnClass(int columnIndex)	Returns the most specific superclass for all the cell values in the column.
int	getColumnCount()	Returns the number of columns in the model.
String	getColumnName(int columnIndex)	Returns the name of the column at columnIndex.
int	getRowCount()	Returns the number of rows in the model.
Object	getValueAt(int rowIndex, int columnIndex)	Returns the value for the cell at columnIndex and rowIndex.
boolean	isCellEditable(int rowIndex, int columnIndex)	Returns true if the cell at rowIndex and columnIndex is editable.
void	removeTableModelListener(TableModelListener l)	Removes a listener from the list that is notified each time a change to the data model occurs.
void	setValueAt(Object aValue, int rowIndex, int columnIndex)	Sets the value in the cell at columnIndex and rowIndex to aValue.

Method Details

getRowCount

int getRowCount()

Returns the number of rows in the model. A JTable uses this method to determine how many rows it should display. This method should be quick, as it is called frequently during rendering.

Returns:

the number of rows in the model

See Also:

• getColumnCount()

getColumnCount

int getColumnCount()

Returns the number of columns in the model. A JTable uses this method to determine how many columns it should create and display by default.

Returns:

the number of columns in the model

See Also:

• getRowCount()

getColumnName

String getColumnName(int columnIndex)

Returns the name of the column at columnIndex. This is used to initialize the table's column header name. Note: this name does not need to be unique; two columns in a table can have the same name.

Parameters:

columnIndex - the index of the column

Returns:

the name of the column

getColumnClass

Class<?> getColumnClass(int columnIndex)

Returns the most specific superclass for all the cell values in the column. This is used by the JTable to set up a default renderer and editor for the column.

Parameters:

columnIndex - the index of the column

Returns:

the common ancestor class of the object values in the model.

isCellEditable

boolean isCellEditable(int rowIndex,
 int columnIndex)

Returns true if the cell at rowIndex and columnIndex is editable. Otherwise, setValueAt on the cell will not change the value of that cell.

Parameters:

rowIndex - the row whose value to be queried

columnIndex - the column whose value to be queried

Returns:

true if the cell is editable

See Also:

• setValueAt(java.lang.Object, int, int)

getValueAt

Object getValueAt(int rowIndex,
 int columnIndex)

Returns the value for the cell at columnIndex and rowIndex.

Parameters:

rowIndex - the row whose value is to be queried

columnIndex - the column whose value is to be queried

Returns:

the value Object at the specified cell

setValueAt

void setValueAt(Object aValue,
 int rowIndex,
 int columnIndex)

Sets the value in the cell at columnIndex and rowIndex to aValue.

Parameters:

aValue - the new value

rowIndex - the row whose value is to be changed

columnIndex - the column whose value is to be changed

See Also:

• getValueAt(int, int)
• isCellEditable(int, int)

addTableModelListener

void addTableModelListener(TableModelListener l)

Adds a listener to the list that is notified each time a change to the data model occurs.

Parameters:

l - the TableModelListener

removeTableModelListener

void removeTableModelListener(TableModelListener l)

Removes a listener from the list that is notified each time a change to the data model occurs.

Parameters:

l - the TableModelListener