I am using the Preferences API in Java to save the users preferences of
my application.
While it works fine when it is standalone application, I get
AccessControlException (java.lang.RuntimePermission preferences) when

I think my understanding of mouse clicked events is wrong because I don't
get the behaviour I expect.  When I implement the following code:
table.getTableHeader().addMouseListener(new MouseAdapter()
{

I am having two problems with processing events.  I know this is a
little long but please bear with me.  I have a feeling that the
solution to one might have something to do with the other.  Hopefully
someone can help out:

I want user to be able to pick colors in JComboBox and I'm stuck. I
wrote my renderer (CellColorRenderer) and it works, but when I pick some
color from the list it dosen't show up in JComboBox selected area, I
guess there's another renderer for that. I've tried to go around that

I would like to ask if it is possible to update a GUI component (e.g.
JTextArea) from an outside class  ?
For example, calling from class One a method of GUI class Two that
updates the component from the Event dispatch thread. Is that a right

I am trying to build a JTextfield that can only be unfocused if value
is valid. And if value is not valid a message should be displayed. In
my demo the value is never valid but it doesn't matter.
I tried it like this:

Is it possible if a popup menu have different items in it, depending on
the content of a jtable cell??
I would be greatful if any one could point me in the right direction.
Thanks

I've building a little GUI.
I've tried to add the same menuitems both to the menu and to the popup menu,
but seems like this can't be done, because items added to popup menu
disappear from the menu.

I am working on a program for editting HTML.  I am using a JEditorPane
with an HTML editor kit.  I am trying to add markups programmatically,
so that the user can click a button and the font will change to
italicized (for example).  What is the proper way to make that happen?

Witajcie,
Jak w diagramach UML opisac sytuacje w ktorej do Listenera podpinam
objekt, ktory umplementuje pewien okreslnony interfejs.
Mam ekran podzielony na dwie czesci. W jednej mam drzewo (JTree),