setActionCommand() and
getActionCommand() methods modify the command string sent
along with the ActionEvent. By default this is the
label of the button, but it can be changed. For instance, you could
use this as a way to pass the number of times the
BeepApplet should beep
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class BeepFiveApplet extends Applet {
public void init () {
// Construct the button
Button beep = new Button("Beep");
// add the button to the layout
this.add(beep);
// specify that action events sent by this
// button should be handled by the applet itself
beep.addActionListener(new MultiBeepAction());
beep.setActionCommand("5");
}
}
class MultiBeepAction implements ActionListener {
public void actionPerformed(ActionEvent ae) {
int n;
try {
n = Integer.parseInt(ae.getActionCommand());
}
catch (NumberFormatException e) {
n = 1;
}
Toolkit tk = Toolkit.getDefaultToolkit();
for (int i = 0; i < n; i++) tk.beep();
}
}