esercizi 10 e 11

public class Controllata extends Exception {}
public class NonControllata extends RunTimeException {}

public class C {
    // esercizio 11
    public static Object Fun(Collection c) throws Controllata {
      if(c == null) throw new Controllata();
      int i = c.size();
      if(c instanceof Vector && i>2) return ((List)c).get(1);
      if(c instanceof LinkedList && i>0) return ((LinkedList)c).removeFirst();
      throw new NonControllata();
    }

    // esercizio 10
    public static void Fun(AbstractButton ab) {
      if(ab instanceof JButton)
          if(ab instanceof BasicArrowButton)
          ((BasicArrowButton)ab).setDirection(SwingConstants.NORTH);
          else ab.setText("pippo");
    }
}