import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class FinalExample extends JApplet {
  static final Color[] colors = {Color.RED, Color.GREEN, Color.BLUE};
  int c = 0;

  @Override
  public void init() {
    final JButton button  = new JButton("Push");
    button.setForeground(colors[c]);
    button.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        c = (c + 1) % colors.length;
        button.setForeground(colors[c]);
      }
    });
    setLayout(new FlowLayout());
    add(button); 
  }

  public static void main(String[] args) {
    JFrame frame = new JFrame("");
    JApplet applet = new FinalExample();
    applet.setPreferredSize(new Dimension(200, 70));
    frame.add(applet);
    frame.pack();
    frame.setVisible(true);
    applet.init();
    applet.start();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}