JTextArea that I would like to have updated as strings are appended

I have a JTextArea that I would like to have updated as strings are appended to it.

Code:

---

    public void updateMessageCenter(String message){
        this.outTextArea.append(message + newline);
     
    }

---

whenever this:

Code:

---

      updateMessageCenter("this would be the message");

---

Is called I would like it to display in the text area.

The append works, but it only displays the result AFTER the program has finished executing.
Thanks

I think you're looking for something like a change listener.

How to Write a Change Listener (The Java™ Tutorials > Creating a GUI with JFC/Swing > Writing Event Listeners)

Greetings.