Instance of which component?

Hi,

If i drag a list component on stage giving name as my_list.
And one TextArea component giving name as my_txt.
At runtime i just wanted to know the component is instance of which class?

meance for my_list i should get answer as List
& for my_txt i should get answer as TextArea.

Is there any method for this?

Please help.
Thanks & Regards,
-Smita.