Making password fields in GenericDialogs

Hi, Wayne, everybody --

I'm working on a plugin that loads and displays images from a Tomcat/JSP 
Web server.  Users will sometimes leave ImageJ idle long enough for a 
session to expire, and I need to re-authenticate, which entails 
prompting for a username and password.  I'd like to take advantage of 
the GenericDialog facility, but that doesn't offer an addPasswordField() 
method.
As a workaround, I've made a subclass of GenericDialog, adding the 
following method:
  public void makePasswordField() {
    if (stringField.size() > 0) {
      TextField tf = (TextField) 
this.stringField.elementAt(this.stringField.size()-1);
      tf.setEchoChar('*');
    }
  }

Calling this method sets the echoChar for the last stringField added to 
the dialog.  (Fortunately, stringField is protected, not private, so I 
can get away with this.)
I can use this method as follows:

  ReauthorizationDialog d = new ReauthorizationDialog("Hey!");
  d.addMessage("Your session has expired.");
  d.addStringField("Username:", "");
  d.addStringField("Password:", "");
  d.makePasswordField();

I could, of course, add further fields after this -- makePasswordField() 
only affects the last string field added before it's called.
This works, although it's pretty much of a kludge.  Wayne, would it be 
worthwhile adding this to GenericDialog, or adding a variant of the 
addStringField() method that accepts an echo character?
--
        -jeffB (Jeff Brandenburg, Duke Center for In-Vivo Microscopy)