......
int c = 0; 
......
                                List columns = new ArrayList();
                columns.add(new AbstractColumn(new Model("操作")){
                        public void populateItem(Item cellItem, String 
componentId, IModel
model){
                                c += cellItem.getIndex()+ 1;
                                
System.out.println("cellItem.getIndex():"+cellItem.getIndex());
                                System.out.println("c:"+c);
                                cellItem.add(new ActionPanel(componentId, 
model));
                        }
                });
......
add(new DefaultDataTable("table", columns, new ColumnDataProvider(),50));
......


the Class ColumnDataProvider extends SortableDataProvider.

cellItem.getIndex() always return 0.    why?


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