org.jdesktop.swingbinding.JTableBinding$BindingTableModel cannot be cast to javax.swing.table.DefaultTableModel

Question

I tried to group JTable header and for that I want to get the DefaultTableModel of current JTable. But when I tried to retrieve the table model like this:

Defaul         


        

Answer 1

According to the JavaDoc for BindingTableModel, the class doesn't extend DefaultTableModel. Rather, it implements TableModel interface. This means that you cannot cast to DefaultTableModel, only to TableModel:

TableModel dm=(TableModel) tblTet.getModel();