How to set a background color of a JButton in Java?

Question

I am developing a Java Desktop Application. In it I have 4 JButtons on a JPanel. Now I want that whenever a button is clicked its background color

Answer 1

1. just use null to use the default color:

   button1.setBackground(Color.ORANGE);
   button2.setBackground(null);
   ...
   

2. consider using JToggleButtons with a ButtonGroup, set the Icon and PressedIcon of the buttons. No need to change the background color.

   button1 = new JToggleButton(new ImageIcon("0.jpg"));
   button1.setSelectedIcon(new ImageIcon("1.jpg"));
   button2 = new JToggleButton(new ImageIcon("0.jpg"));
   button2.setSelectedIcon(new ImageIcon("2.jpg"));
   ...
   ButtonGroup group = new ButtonGroup();
   group.add(button1);
   group.add(button2);
   ...