import java.awt.*; import java.awt.event.*; import java.applet.*; public class AppletI extends Applet { Color color = Color.red; public void start() { System.out.println("start ..."); } public void stop() { System.out.println("stop ..."); } public void destroy() { System.out.println("destroy ..."); } public void init() { System.out.println("init ..."); setLayout(new BorderLayout()); final Canvas c = new Canvas() { { setSize(300, 300); } public void paint(Graphics g) { g.setColor(color); g.fillRect(0, 0, 300, 300); } } ; add("North", c); Button b = new Button("Change Color"); add("South", b); b.addActionListener( new ActionListener() { public void actionPerformed(ActionEvent event) { if (color == Color.red) { color = Color.blue; } else if (color == Color.blue) { color = Color.green; } else if (color == Color.green) { color = Color.red; } c.repaint(); } } ); } } // must be public class /* The associated html file */