javax.swing.table

Class AbstractTableModel

Contents
  • 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 JavaBeansTM has been added to the java.beans package. Please see XMLEncoder.

    • 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 interface TableModel
        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 interface TableModel
        Parameters:
        columnIndex - the column being queried
        Returns:
        the Object.class

      • 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 interface TableModel
        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 interface TableModel
        Parameters:
        l - the 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.
        See Also:
        TableModelEvent, EventListenerList, JTable.tableChanged(TableModelEvent)

      • 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

      • getListeners

        public <T extends EventListener> T[] getListeners(Class<T> listenerType)
        Returns an array of all the objects currently registered as FooListeners upon this AbstractTableModel. FooListeners 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.
        Parameters:
        listenerType - the type of listeners requested; this parameter should specify an interface that descends from java.util.EventListener
        Returns:
        an array of all objects registered as FooListeners on this component, or an empty array if no such listeners have been added
        Throws:
        ClassCastException - if listenerType doesn't specify a class or interface that implements java.util.EventListener
        Since:
        1.3
        See Also:
        getTableModelListeners()

Document created the 11/06/2005, last modified the 04/03/2020
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