swing - Java GUI app frame doesn't display correctly when launched? -

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i have made tictactoe app using java swing library. ever since i've added menu, wouldn't launch expected. mean, functionality fine sometimes display 1 of 3 undesirable methods have in image when launch it. however, once maximize , minimize frame, display in desired manner.

kindly me fix this.

enter image description here

you adding components frame once visible. call frame.setvisible(true); after have added components or have revalidate container. once container visible , layed out, have call validate/revalidate if add or remove components.


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