启动时，Java GUI应用程序框架无法正确显示？

Question

I have made this TicTacToe app using the Java Swing library. Ever since I've added the menu, it wouldn't launch as expected. I mean, the functionality is fine but it would sometimes display as one of the three undesirable methods I have in the image when I launch it. However, once I maximize and minimize the frame, it would display in the desired manner.

Kindly help me fix this.

Answer 1

You are adding components to the frame once its already visible. Call frame.setVisible(true); only after you have added all components or you will have to revalidate the container. Once a container is visible and layed out, you have to call validate / revalidate if you add or remove components.

Answer 2

You are showing the frame before all the items are added

public void setUpFrame() {
    ...

    frame.setVisible(true);
}

Answer 3

just move the frame.setVisible(true); to the end of the setUpFrame() method :)

i know that i already answer your question but i made this answer because i saw that if i press on the menu item of the exit, it "close" the window, it stays open in the background.

if you want to close the program completly use System.exit(0); instead of frame.setVisible(false); in the item_exit ActionListener

nice game and keep programming ;)