TreeTable uses a TreeTableModel as its table model, which can be specified at construction time using the constructor:

public TreeTable(TreeTableModel model);

You can also create a TreeTable by specifying the underlying data with a ListTableModel:

public TreeTable(ListTableModel model);

In this case, a TreeTableModel will be created automatically with the method:

protected static TreeTableModel createDefaultTreeTableModel(ListTableModel tableModel);

The TreeTableModel created will provide a wrapping around the supplied ListTableModel, and will also become the TreeTable's data model.