1     package version03;
2     /**
3      * Curso B?sico de desarrollo de Juegos en Java - Invaders
4      * 
5      * (c) 2004 Planetalia S.L. - Todos los derechos reservados. Prohibida su reproducci?n
6      * 
7      * http://www.planetalia.com
8      * 
9      */
10    
11    
12    import java.awt.Canvas;
13    import java.awt.Color;
14    import java.awt.Dimension;
15    import java.awt.Graphics;
16    import java.awt.event.WindowAdapter;
17    import java.awt.event.WindowEvent;
18    
19    import javax.swing.JFrame;
20    import javax.swing.JPanel;
21    
22    public class Invaders extends Canvas {
23      public static final int WIDTH = 800;
24      public static final int HEIGHT = 600;
25      
26      public Invaders() {
27        JFrame ventana = new JFrame("Invaders");

28        JPanel panel = (JPanel)ventana.getContentPane();
29        setBounds(0,0,WIDTH,HEIGHT);
30        panel.setPreferredSize(new Dimension(WIDTH,HEIGHT));
31        panel.setLayout(null);
32        panel.add(this);

33        ventana.setBounds(0,0,WIDTH,HEIGHT);
34        ventana.setVisible(true);
35        ventana.addWindowListener( new WindowAdapter() {
36          public void windowClosing(WindowEvent e) {
37            System.exit(0);
38          }
39        });
40      }
41      

42      public void paint(Graphics g) {
43        g.setColor(Color.red);
44        g.fillOval( WIDTH/2-10, HEIGHT/2-10,20,20);
45      }
46      

47      public static void main(String[] args) {
48        Invaders inv = new Invaders();
49      }
50    }
51