Removing all the rows of DefaultTableModel

I want to delete all the rows of DefaultTable. I found two common ways to delete them on internet, but none of them works in my case because those methods does not exist in my DefaultTableModel. I wonder why. My code for using DefaultTableModel is

DefaultTableModel Table = (DefaultTableModel) Table.getModel();

One way to delete is

Table.removeRow(Table.getRowCount() - 1);

but this removerow method does not exist in my DefaultTableModel.