i have got this doubt.. i want to add two nos. i get these two nos.
in two seaprate text fields. I want the result of this addition to
be stored in another separate text field.I didn't know how to do
this..since only strings can be stored in text fields.plz clarify my
doubt.

Use the parseInt() method in the Integer object:

String s = "27";
int x = Integer.parseInt(s);