Beispiel: Ereignisbehandlung

public class Counter { ...
  Button inc = new Button ("inc");
  public void init () { ...
    add (inc);
    inc.addActionListener (
      // anonyme innere Klasse:
      new ActionListener () { 
        public void actionPerformed 
             (ActionEvent a) {
          status++; update ();
      } } 
    );
} }