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Call validate() for the frame after you change the menu

Chow Kwan Yu wrote in message <368A9A11.5CDE@alumni.ust.hk>...
>hi, can anyone help me...
>
>the background of my application is:
>
>I have put 2 JMenuBar (say barA and barB) into the JFrame (say frameX).
>
>Initially, in jbinit() of frameX, barA is set:
>this.setJMenuBar(barA);
>
>one menu item of barA invoke:
>this.setJMenuBar(barB);
>another menu item of barB invoke:
>this.setJMenuBar(barA);
>
>when I compiled and run the program, barA is shown on the frame
>as expected.
>
>However, when the first time I click that menu item to switch to barB,
>the region showing the menu doesn't change.  It changes correctly only
>if I resize the frame.
>
>For the second and third time and so on.  The switching between barB and
>barA are running very fine.  Only problem occurs at the first time to
>switch the menu bar.
>
>Any idea on which places I should take care to solve the problem?
>
>thank you in advance.
>
>Bee