JList in JScrollPane

Question

I have a JList in a JScrollPane and want the scroll pane to behave like it would not exists (concerning preferredSize) when the list contains less than 10 items. As soon as the list contains at least 10 items I want the scroll pane to have a preferred size like the list would have with 10 items. How is that possible?

Answer 1

Use JList.setVisibleRowCount(int). That will set a preferred height for the list that the scroll pane will attempt to honor.