How to prevent JScrollPane arrow key handling from moving caret when Scroll Pane wraps Text Pane

Question

I have the following requirements:

I need a scrollable JTextPane. The user may type into this text pane, or text may be inserted into it that is not typed by the us

Answer 1

What if you let user place caret e.g. to let him select and copy some text?

I would add a DocumentFilter (or override insertString() method of the Document) and in all cases perform insert in the doc.getLength() position and resetting the caret to the doc.getLength() position after the insert.