Well, you seem to already know how to pass arguments to a method, as (for example) here:
File f = new File("c:\\abc.txt");
In that line, you're sending the
String "c:\\abc.txt" to the File constructor; the File constructor does whatever it want to with that String. If you saw File's constructor, it would look like
File(String filename) { ...
That means the constructor takes a single String argument. Inside the File constructor, the String is available as the variable "filename".
So you want "storeData" to take some number of arguments. For example, you might like four arguments:
public void storeDate(String fname, String lname, String city, String state) ...
and then you'd pass those four arguments when you call it, and inside storeData, those four variables would be available.
Now the problem here is that you've written storeData so that it calls dbTest, and written dbTest as if it were going to call storeData; I think you just need to clarify in your mind what each routine does.
Does this help?