protected FileDialogPeer createFileDialog (FileDialog fd)
  {
       checkHeadless();
       GtkMainThread.createWindow(); /* <---- missing */
       return new GtkFileDialogPeer (fd);
  }

/*Test case results in deadlock:*/

import java.awt.*;
public class FileLoadDialog 
{

public static void main(String[] args) 
{
  Frame fr = new Frame("Frame");
  FileDialog fd = new FileDialog(fr,"Find file path...", FileDialog.LOAD );
  fd.setVisible(true);

  if (fd.getFile() != null)
    System.out.println(fd.getDirectory() + fd.getFile());
  else
    System.out.println("Load cancelled........");
}

}