To reproduce, bring up the JFileChooser in SwingSet2, and change to a directory with enough items to warrant scrollbars. Behavior observed:

Page-up: works once, and then ceases to work, as if at the top of the listing
Page-down: bounces the selection back and forth on a single screen, but never actually scrolling to additional items.

I can reproduce this with Merlin (b86) on Solaris and Win2K.

This problem was mentioned in bug 4408515, but didn't make it into the fix.

Page-up/page-down scrolling works with 1.3.1, although 1.3.1 uses a vertical listing rather than a horizontal one.

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Test case for JList:

import javax.swing.*;

public class Bug4527906 {
    public static void main(String[] args) {
JFrame f = new JFrame();
String[] values = new String[500];
for (int i=0; i < values.length; i++) {
values[i] = i + "";
}
JList list = new JList(values);
list.setLayoutOrientation(JList.VERTICAL_WRAP);
list.setVisibleRowCount(-1);
f.getContentPane().add(new JScrollPane(list));
f.setSize(300, 200);
f.setVisible(true);
    }
}

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