JButton not visible until mouseover

Question

I\'m creating a gui for my project. When the gui is first loaded only background is visible, so buttons are not visible, but when mouse over them, they are visible. What is

Answer 1

Just make sure that the setvisibility of all other panels except the one which you wish to display is set to false.I too had a similar problem but i had forgotten to set visibility of one of the 10 panels to false.Problem resolved once i set it to false.