JFileChooser wiping filename on selecting a new filter / file type

Question

Got a new and annoying little quirk with File Chooser under 1.4.2 (actually using 1.4.2_01 here). The new L&F for Windows XP is great, but whenever I type a filename and change the file type, whatever I've typed gets cleared and I'm forced to re-type, or reselect the filename again..? any ideas on why or ways to prevent this behaviour; previous versions of this dialog didn't do this, nor do the native dialogs.
- Richard

Answer 1

The culprit is line 2068 in WindowsFileChooserUI, in the listener for the combobox someones added the explicit command setFileName(null); in the 1.4_xx versions.
I've gotten around this with a little side-shuffle, create your own FileChooserUI thusly:
public class MyWindowsFileChooserUI extends WindowsFileChooserUI {
    public MyWindowsFileChooserUI(JFileChooser filechooser) {
        super(filechooser);
    public static ComponentUI createUI(JComponent c) {
        return new MyWindowsFileChooserUI((JFileChooser)c);
    // patch the filter change filename blanking bug 4678049
    public void setFileName(String filename) {
        if (filename != null) {
            super.setFileName(filename);
}and install it as the default somewhere in your code like this;
if (UIManager.getLookAndFeel().getName().equals("Windows")) {
UIManager.put("FileChooserUI", "osbaldeston.swing.MyWindowsFileChooserUI");
}All filechoosers created after this assignment shouldn't blindly wipe the filename anymore. Other look & feels seem to have the same problem, with the same line in the same routine; so overriding the FileChooserUI L&F of your choice with a modified version of the above (MyMetalFileChooserUI etc..) should work just fine.
(sorry jeff)