滚动条覆盖了带有VERTICAL_WRAP的JList的最后一行

Question

I want to layout a JList on one line horizontally, and have it scroll only horizontally. I've found list.setLayoutOrientation(JList.VERTICAL_WRAP); which works well if there are few enough items. However, when the list needs to scroll, the scrollbar covers the last (and only) row of the list, so you can't see it at all. How can I prevent this?

My test code:

JList<String> list = new JList<>("TIVFBJPAVUOHCVINPNYLMSMNNDUSHVSWUYUSNZXTYTXJMJPTISAVVYHOPBFIAXSUUQYYPVGAKEEWOTRCBWQWRXQTYJLCTTHTXPMZWDLQRRUZJSVWDMLYNRUDZXRTEJWAZUOBQCWNCYEPVCPXVWOGVZPOEKPWZZFDGZZGXPBFZQQVKFIXCYFTHRPJJMOYISEUCUTJGZQI".split("[A-D]"));
list.setLayoutOrientation(JList.VERTICAL_WRAP);
list.setVisibleRowCount(1);
frame.add(new JScrollPane(list), BorderLayout.NORTH);

The result:

Answer 1

Force the scroll pane to include the horizontal scrollbar in its size calculation:

JList<String> list = new JList<String>( ... );
list.setLayoutOrientation(JList.VERTICAL_WRAP);
list.setVisibleRowCount(1);
JScrollPane scrollPane = new JScrollPane( list );
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
frame.add( scrollPane );