Changing the titles of all frames in a running application

Question

Hi All,
I've got a 50+ frame application. I have realized that I need to update the frame titles for all the frames based upon some event that can be initiated by any of the frames. Each frame title will be different but will incorporate a bit of knowledge about the event. (Note that when I use the term "event", I'm using it in the normal English language sense, not a Java language sense!)
I've been considering a few approaches and most look either stupid or a whole lotta' work! I'm looking for how to do this the "right way." ...I don't have a broad enough experience to know what's "common" regarding application architecture, but here's what I've got:
A "Master" class kicks things off. It instantiates a few things like a database connection and so forth, and then it starts a MainFrame that appears on the users screen. The MainFrame, and all of its children, are actually of a class that's an extension of JFrame.
It's my supposition that I'd like to create some kind of frame pointer holder in the Master, and all frames "register" themselves. When an event occurrs that warrants changing the frame titles, the Master walks the collected frame pointers and directs the titles be changed, as appropriate. ...OR... Is there already a collection of "children" of the master? How would I get that list and how would I walk it looking for a frame?
Another idea is to be able to send some kind of notification to each frame and say, "Go Update Your Title!"
Example code GREATLY appreciated!
Thanks much,
Richard

Answer 1

... While looking into doing this EventObject thing, I noticed that EventObjects are a heavyweight version of what I want... What it really boils down to is:
Master defines:
private static Master M = null;
Vector myChildren = new Vector();
Then in the constructor:
M = this;
Then in a method:
Vector v = (Vector)myChildren.clone;
for (int i=0; i<v.size(); i++;)
((JFrame)v.elementAt(i)).updateTitle();
In each JFrame (in my case, in the class that extends JFrame):
M.addElement(this);
and in the right place
M.removeElement(this);
Oh yeah, and don't forget a method to set the frame title!...
public void updateTitle()
this.setTitle("whatever");
...That's it! WAY easier than all that foolishness with declairing your own event listeners and everything... For my needs, this was the way to go!
Regards,
Richard