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
