Swing Menus and Toolbars - The Definitive Guide to Java Swing - page 196

static final Random random = new Random();
// Define ActionListener
static class ButtonActionListener implements ActionListener {
public void actionPerformed(ActionEvent actionEvent) {
System.out.println("Selected: " + actionEvent.getActionCommand());
}
}
// Define Show Popup ActionListener
static class ShowPopupActionListener implements ActionListener {
private Component component;
ShowPopupActionListener(Component component) {
this.component = component;
}
public synchronized void actionPerformed(ActionEvent actionEvent) {
JButton button = new JButton("Hello, World");
ActionListener listener = new ButtonActionListener();
button.addActionListener(listener);
PopupFactory factory = PopupFactory.getSharedInstance();
int x = random.nextInt(200);
int y = random.nextInt(200);
final Popup popup = factory.getPopup(component, button, x, y);
popup.show();
ActionListener hider = new ActionListener() {
public void actionPerformed(ActionEvent e) {
popup.hide();
}
};
// Hide popup in 3 seconds
Timer timer = new Timer(3000, hider);
timer.start();
}
}
public static void main(final String args[]) {
Runnable runner = new Runnable() {
public void run() {
// Create frame
JFrame frame = new JFrame("Button Popup Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ActionListener actionListener = new ShowPopupActionListener(frame);
JButton start = new JButton("Pick Me for Popup");
start.addActionListener(actionListener);
frame.add(start);