JButton setBackground doesn't work

Question

i try to set Background color of jbutton, but doesn't work? Look at image. Why doesnt work? How to fix?

I want red background :-)

    save_button.setForeground(Color.red);
    save_button.setBackground(Color.red);
    close_button.setForeground(Color.red);
    close_button.setBackground(Color.red);

Answer 1

Add to the code for both buttons :

save_button.setOpaque(true);

It should work, if not try disabling the border color