Search:

Absolutely! Sorry I didn't say it well, suggesting you weren't using the right components, because you are. The code to do what you want will look like:

jTextArea.append( jTextField.getText() );...

Wow! Great progress.

As for your question, you need to use a component that allows text to be appended to that already existing in or contained by the component. A JTextArea has that ability...

What do you need help with? How much Swing experience do you have? How much Java experience do you have?

What you describe is a JFrame with 2 or 3 components, some file I/O, a couple action...