Pop-Ups and Choosers - The Definitive Guide to Java Swing - page 300

public static void main(String args[]) {
Runnable runner = new Runnable() {
public void run() {
JFrame frame = new JFrame("JColorChooser Create Popup Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JButton button = new JButton("Pick to Change Background");
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
Color initialBackground = button.getBackground();
final JColorChooser colorChooser =
new JColorChooser(initialBackground);
// For okay selection, change button background to selected color
ActionListener okActionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
Color newColor = colorChooser.getColor();
if (newColor.equals(button.getForeground())) {
System.out.println("Color change rejected");
} else {
button.setBackground(colorChooser.getColor());
}
}
};
// For cancel selection, change button background to red
ActionListener cancelActionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
button.setBackground(Color.RED);
}
};
final JDialog dialog = JColorChooser.createDialog(null,
"Change Button Background", true, colorChooser,
okActionListener, cancelActionListener);
// Wait for current event dispatching to complete before showing
Runnable showDialog = new Runnable() {
public void run() {
dialog.setVisible(true);
}
};