Here is a code for a test applet that implaments an action listener. The applet may not work by itself but should with minor modification.
Good luck
-Wiszh
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class TestApplet extends Applet implements ActionListener {
private Button btSubmit = new Button("Submit"

;
private TextField txtExt = new TextField(4);
private TextField txtTopic = new TextField();
public void actionPerformed(ActionEvent e) {
//if sumit button clicked
if (e.getActionCommand().equals("Submit"

)
//do some stuff
}
public void init() {
super.init();
try {
setName("TestApplet"

;
setLayout(null);
setSize(426, 320);
add(btSubmit, "btSubmit"

;
btSubmit.addActionListener(this);
add(txtExt);
add(txtTopic);
}
public static void main(java.lang.String[] args) {
MakeReservation applet = new MakeReservation();
java.awt.Frame frame = new java.awt.Frame("Complete Room Reservation"

;
frame.add("Center", applet);
applet.init();
applet.start();
frame.pack();
frame.setSize(450, 350);
frame.show();
}
}