Hi,

I have the following code:

public class Test extends JFrame implements ActionListener{

private static final Color TRANSP_WHITE = new Color(new Float(1), new Float(1), new Float(1), new Float(0.5)); private static final Color TRANSP_RED = new Color(new Float(1), new Float(0), new Float(0), new Float(0.1)); private static final Color[] COLORS = new Color[]{ TRANSP_RED, TRANSP_WHITE}; private int index = 0;

private JLabel label; private JButton button; public Test(){ super();

setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS)); label = new JLabel("hello world"); label.setOpaque(true); label.setBackground(TRANSP_WHITE);

getContentPane().add(label);

button = new JButton("Click Me"); button.addActionListener(this);

getContentPane().add(button);

pack(); setVisible(true); }

@Override public void actionPerformed(ActionEvent e) { if(e.getSource().equals(button)){ label.setBackground(COLORS[index % (COLORS.length - 1)]); } }

public static void main(String[] args) { new Test(); } }

When I run it I get the label with the TRANSP_WHITE background and then when I click the button this color changes to TRANSP_RED but when I click it again I see no change in color. Does anyone know why?

Thanks