Welcome to the Ranch!
I see some problems with your code:
a) Too long to read for people to help out - I suggest you create a SSCCE.
b) You are using both AWT and Swing components. ex.: TestField in the second class - this is a bad idea if intentional. If not, you should remember that Swing components start with a 'J' and you might have missed it.
c) I don't see any method where you set the text to (in the second class).