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Dynamic Menus

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I am building an application (not an Applet) using Swing that requires different menus (within the menu bar) for each screen.
Essentially, I am trying to rebuild the menu bar for each screen, using shared components for those menu items that are common to all of the screens.
I can successfully remove all of the menus from the JMenuBar. However, when I try to add new menus to the JMenuBar, they don't appear as they should.
Can anyone explain why that is? I have tries using the remove(), removeAll(), and removeComponent() methods of JMenuBar. I have also tried creating an entirely new JMenuBar.
If anyone can provide a better way for making menus dynamic, I would definetely be open to that.
Jeff Wisard
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I figured it out. I needed to call validate() after recreating the menus.
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Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
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