예제 #1
0
 public void quack() {
   Iterator iterator = ducks.iterator();
   while (iterator.hasNext()) {
     Quackable duck = (Quackable) iterator.next();
     duck.quack();
   }
 }
예제 #2
0
 void simulate(Quackable duck) {
   duck.quack();
 }
예제 #3
0
 public void quack() {
   duck.quack();
   numberOfQuacks++;
 }