Renaming the title of a frame from a panel

Hi,
I've searched the forum but I could not find anything that help me...
I want to change the title of Main(a class that extends JFrame) from MainPanel(a class that extends JPanel)
somewhere in my MainPanel I use:
((Main)getParent()).setTitle("A new Title...");Idont have any compiling error, but I get an exception
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JPanel
        at mw_recipebook.MainPanel.actionPerformed(MainPanel.java:173)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
        ...I've used succesfully the method:((aClass)getParent()).aMethode();before, when using from a childPanel to call a methode in it's parentPanel, but from panel to frame it does not work.... help! How do I do that?
Thank's

... or else you can try this:
( (JFrame)getRootPane().getParent()
).setTitle("Title");
thank's allot
I tought of getRootPane(), but not getRootPane().getParent()

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Renaming the title of a frame from a panel

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