New line in database

I'm not sure if this is the right place to post this, but here i go:
i'm building an app that basically allows users to fullfill some forms, which then are persisted to a database.
At a certain point i've a multiple choice question:
Which strategies did you use in order to achieve your goals?
And then i show check boxes with respective labels (text):
- strategie A
- strategie B
- etc
- others strategies.
Now, if user choses this last one, i wanted her to be able to insert each new strategie in a way that every new strategie from user would be inserted into a new line in a related table in database.
How can i achieve it?
Which swing component could performe it?
Or there is an alternative way of doing this?
Thanks in advance

I'm not sure whether I understood, so I make a new example to show what I understood:

Now the first user inserts 'a4: ruby'
The second 'a4: prolog'
The third 'a4: ruby'.
Your database may look like this:

You might use a single JTextField which disabled by default, or
setEditable (false) - see the docs for that - and enabled when marking q4.
Or a JComboBox, which is populated by the new values, but contains an empty line, to insert a new value. This might prevent users from entering 'delphi Delphi DELPHI, "MS Delphi", "Delphi 7.0" and perhaps Delfi' if the 'Delphi'-man comes first

In first place thanks for your reply!
I guess i mean another thing:
user chooses whatever,as you said, and then chooses 'other'
Then, she should be able to input:
java
c
c++
etc;
another user who also chooses 'other' might want to input:
java
pascal
another might just want:
delphi
etc etc
What i want now is that the related table looks like this:

Hope i made myself clearer this time

[ May 12, 2004: Message edited by: miguel lisboa ]

You could create a combobox.
When the user selects a nonempty entry, you create a second combobox, where the second item might be choosen.

Or a combobox with multi-selection (by hitting control).

Or you create two lists:

with add- and remove-button, and a field for new entrys.

Better late then never

Yes! that's the right idea
and i got it working!
and there's a similar solution in a listdemo example from sun tutorials (hire and fire buttons that add/remove to a jlist)
Thanks a lot!