Java by API/javax.swing/PopupFactory

PopupFactory: getPopup(Component owner, Component contents, int x, int y)

   <source lang="java">

import java.awt.ruponent; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.Popup; import javax.swing.PopupFactory; import javax.swing.Timer; public class MainClass {

 static final Random random = new Random();
 static class ButtonActionListener implements ActionListener {
   public void actionPerformed(ActionEvent actionEvent) {
     System.out.println("Selected: " + actionEvent.getActionCommand());
   }
 }
 static class ShowPopupActionListener implements ActionListener {
   private Component component;
   ShowPopupActionListener(Component component) {
     this.ruponent = 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[]) {
   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);
   frame.setSize(350, 250);
   frame.setVisible(true);
 }

}

      </source>