This is the code for the program that allows you to press a button and change the message:

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class Guess extends Applet implements ActionListener
{
  Label greeting = new Label("Who's the greatest?");
  Font normalFont = new Font("TimesRoman", Font.PLAIN,16);
  Button pressMe = new Button("Press Me");
  public void init()
  {
    greeting.setFont(normalFont);
    add(greeting);
    add(pressMe);
    pressMe.addActionListener(this);
  }
  public void actionPerformed(ActionEvent thisEvent)
  {
    Font bigFont = new Font("TimesRoman", Font.ITALIC,30);
    Label answer = new Label("");
    answer.setFont(bigFont);
    answer.setText("Lloyd is!!!");
    add(answer);
    remove(greeting);
    remove(pressMe);
    invalidate();
    validate();
  }
}