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); 
  }
}