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

public class PressMe implements ActionListener
{
  public PressMe ()
  {
    JFrame frame = new JFrame("Event Test");
    Container content = frame.getContentPane();
    content.setLayout(new FlowLayout());
    frame.setSize(300,300);

    JButton myButton = new JButton("Press Me!");
    content.add(myButton);
    myButton.addActionListener(this);
    
    frame.setVisible(true);
  }

  public void actionPerformed(ActionEvent ae)
  {
    JButton jb = (JButton) ae.getSource();
    jb.setText("Thank You!");
  }
  
  public static void main(String[] args)
  {
    new PressMe();
  }
}