import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JFrame;

import javax.swing.Timer;

/**

* Simulates the arcade game Whack-A-Mole.

* https://en.wikipedia.org/wiki/Whac-A-Mole

*/

public class WhackAMole implements ActionListener {

private Drawing drawing;

private Toolkit toolkit;

/**

* Set up the drawing and window frame.

*/

public WhackAMole() {

// create drawing, add polygons

drawing = new MoleHill(800, 600);

drawing.add(new Mole(150, 200));

drawing.add(new Mole(350, 200));

drawing.add(new Mole(550, 200));

drawing.add(new Mole(150, 400));

drawing.add(new Mole(350, 400));

drawing.add(new Mole(550, 400));

// set up the window frame

JFrame frame = new JFrame("Whack-A-Mole");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setResizable(false);

frame.add(drawing);

frame.pack();

frame.setVisible(true);

toolkit = frame.getToolkit();

}

@Override

public void actionPerformed(ActionEvent e) {

toolkit.sync();

drawing.step();

}

/**

* Create and start the timer.

*

* @param args command-line arguments

*/

public static void main(String[] args) {

WhackAMole sim = new WhackAMole();

Timer timer = new Timer(1000 / 30, sim);

timer.start();

}

}