Java Swing notepad

Question

I'm working with Intellij IDEA, Java 9.0.1 and Gradle.

 

I have a JSplit with a JList on the left and JTabbedPane on the right

 

 

After creating some "open" function to import a text file to the program, I want to see the imported file in the following manner:

• The filename.extension on the JList (LEFT)
• The textual content on the JTabbedPane (RIGHT)

What I've tried:

• Created a JList & JTabbedPane, added them to a JSplit.
• I have a JFileChooser action listener, when the user opens his file... this is where I'm stuck.

Final Questsion: how to properly add files using JFileChooser in a way they will be added both to JTabbedPane and to JList simultaneously & relatively?