// this is the basics of gui stuff
import java.awt.*;
import javax.swing.*;
import java.awt.event .*;

public class J04Swing implements ActionListener
{
  // note the concept of class data
  
  private static JLabel myLabel;

  public static void main(String[] args)
  {
    myLabel = new JLabel("Some Text");
    JButton myButton = new JButton("Press Me");
    myButton.addActionListener(new J04Swing());
    JFrame jf = new JFrame();
    jf.getContentPane().setLayout(new FlowLayout());
    jf.getContentPane().add(myLabel);
    jf.getContentPane().add(myButton);
    jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    jf.pack();
    jf.setVisible(true);
  }	
  
  public void actionPerformed(ActionEvent e) 
  {
    myLabel.setText("Alternate Text");
  }
}