Problem with JTable checkbox

Question

In my table I have a column of checkboxes. If user clicks any checkbox, the program will first check for some condition and pop out a warning dialog saying that "the action will change the current mode. are you sure you want to continue?". If user select "yes", some action are taken and the checkbox should be selected. Now the problem is that after user select "yes", the checkbox is not selected. (Same as when you press your mouse at a checkbox and then drag it out the checkbox cell, the actions are taken but the checkbox is not selected.)
The code for the cell editor is as follows:
public Component getTableCellEditorComponent(JTable table, Object value,
           boolean isSelected, int row, int column) {
         if (value instanceof ComboString) { // ComboString
           flg = COMBO;
           String str = (value == null) ? "" : value.toString();
           System.out.println("+++++++ " + row+" : "+column+"  flg: "+flg);
           return cellEditors[COMBO].getTableCellEditorComponent(table, str,
               isSelected, row, column);
         else if (value instanceof Boolean) {                    
           flg = BOOLEAN;
           Boolean check = Boolean.getBoolean(value.toString());
                      // promptContinue returns true for continue, false for return; inside it a dialog box is popped for user selection "continue or not"
                      if(!promptContinue()){
                            return null;
           return cellEditors[BOOLEAN].getTableCellEditorComponent(table,
               value, isSelected, row, column);
         

Answer 1

Thanks. But my problem is not with stopping the editor, but with continuing the editor. Following is the code of getCellEditorValue()
public Object getCellEditorValue() {
         switch (flg) {
         case COMBO:
           String str = (String) comboBox.getSelectedItem();
           return new ComboString(str);
         case BOOLEAN:
         case STRING:
           return cellEditors[flg].getCellEditorValue();
         default:
           return null;
            }I am not very sure whether it is the problem of cell editor or cell renderer, because it seems the code for continue condition is actually executed which is supposed to make the checkbox checked, but the result turns to be that the checkbox is not checked.