Using Jtextfield On Jframe (Swing) To Enter Search Terms In Different Class

I have a swing jFrame set up with a control group which contains 3 radio buttons.

When one is clicked it sends its label to a jtextfield in a different class i have code parsing text by a term

Java Code:

Scanner s = null;
try {
s = new Scanner(new BufferedReader(new FileReader("/Stage_One.txt")));
s.useDelimiter("*");
String total = (s.next());
Pattern p = Pattern.compile("
[
]+");

[Code] ....

I just need to know how to access the jframe variables (textfields, panels and such) so i can use their inputs in code to filter a text file.