JFileChooser.showSaveDialog and Filename field

Question

I am implementing the actionPerformed method for a "Save As" menu command. In my standard JFileChooser "Save" dialog (showSaveDialog, Metal L&F), I volunteer the current filename (by a previous call to setSelectedFile). The dialog opens just fine. If the user selects a file in the list, the name of the selected file appears in the "File name" textfield as expected. But if the user selects a directory in the list, the name of the directory likewise appears in the "File name" textfield.
From other programs (including JBuilder4) I am used to having the filename stay put when I select and/or open a directory in a Save Dialog. Is this just the way a JFileChooser save dialog works in the Metal L&F, am I doing something strange, or is there a workaround?
Thanks very much.
    File tempFile = new File( activePI.getPathname() );
    defaultSaveDir = tempFile.getParentFile();
    JFileChooser chooser = new JFileChooser(defaultSaveDir);
    chooser.setSelectedFile(tempFile);

Answer 1

Thanks to both of you for the help. I actually came up with the key element of trevorryan1's solution shortly after posting my followup yesterday: consuming any setSelectedFile call when the file argument is a directory. Once this test is in, the counter etc is no longer needed! I consider the JFileChooser's "overwrite the filename textfield" behavior to be a bug, since my !file.isDirectory() override of setSelectedFile shouldn't do anything that setFileSelectionMode(JFileChooser.FILES_ONLY) doesn't already do (FILES_ONLY is the default setting).
Here is the test class that I posted to the BugParade; I'll post the URL when/if it shows up.
import java.io.File;
import javax.swing.JFileChooser;
class JFileChooserBug
  //Note: comment out the first or second declaration of JFileChooser chooser
  public static void main(String[] args)
    // 1. in a standard JFileChooser save dialog, navigating to another
    // directory will (inappropriately) overwrite the "File name:" textfield.
    // This should not happen when fileSelectionMode = FILES_ONLY (the default).
    JFileChooser chooser = new JFileChooser();
    // 2. in a JFileChooser with a hacked setSelectedFile method, the
    // "File name:" text field is (appropriately) left alone.
    //JFileChooser chooser = new MyJFileChooser();
    //chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);  // = default anyway
    // show the Save dialog with a default file selected
    chooser.setSelectedFile( new File("dummyfile") );
    chooser.showSaveDialog(null);
  public static class MyJFileChooser extends JFileChooser
    //OVERRIDE
    public void setSelectedFile(File file)
      if ( !file.isDirectory() )
        super.setSelectedFile(file);
}