e954. preventing invalid values in a cell in a jtable component.txt

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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();
        }
    }