Do you have a solution to implement a listener with jXSearchPanel to be able to execute some code when users adds text on the search field?
I searched within javadoc but I can't find what I'm looking for.
I don't know anything about JXSearchPanel, but I would guess the panel uses (or extends) a regular JTextField. If this is the cause then you can just add a DocumentListener to the Document of the text field.
Read the section from the Swing tutorial on How to Write a Document Listener for a working examples.