The Java Developers Almanac 1.4


Order this book from Amazon.

   
Home > List of Packages > javax.swing.table  [62 examples] > Editing  [8 examples]

e954. Preventing Invalid Values in a Cell in a JTable Component

This example demonstrates how to modify a custom table cell editor to prevent invalid values from being saved. See e953 Creating a Custom Table Cell Editor in a JTable Component for more information about table cell editors.
    
    public class MyTableCellEditor extends AbstractCellEditor implements TableCellEditor {
        // See e953 Creating a Custom Table Cell Editor in a JTable Component
        // for other methods that need to be implemented.
    
        // This method is called just before the cell value
        // is saved. If the value is not valid, false should be returned.
        public boolean stopCellEditing() {
            String s = (String)getCellEditorValue();
    
            if (!isValid(s)) {
                // Should display an error message at this point
                return false;
            }
            return super.stopCellEditing();
        }
    }

 Related Examples
e953. Creating a Custom Table Cell Editor in a JTable Component
e955. Setting the Activation Click Count for a Table Cell Editor in a JTable Component
e956. Programmatically Starting and Stopping Cell Editing in a JTable Component
e957. Creating a Text Field That Mirrors the Value in the Anchor Cell in a JTable Component
e958. Disabling User Edits in a JTable Component
e959. Using a JComboBox in a Cell in a JTable Component
e960. Using a List JSpinner as a Cell Editor in a JTable Component

See also: Cells    Column Heads    Columns    Events    Layout    Rows    Scrolling    Selection    Sorting    Table Model    Tool Tips   


© 2002 Addison-Wesley.