There is just confusing information here without any concrete facts.
1)Do you want to know how to dynamically add rows to the table? Did you go through the DefaultTableModel API? Did you notice any methods which would let you add rows/ columns?
2)What kind of table model have you already provided? What problem are you facing here?
3) You can use any component which subclasses Component as the renderer. The TableCellRenderer#getTableCellRendererComponent() is expected to return a Component, so does the TableCellEditor.
If you give us more information on #1 and #2, it will help us help you.
Please tell us the details