Abril 08
                               Prof(s). Ismael H. F. Santos & Eduardo Bezerra                                        31
Singleton (implementação)
npublic final class Singleton {
n  private static Singleton instance = null;
n
n  private Singleton () {
n   ...
n  }
n
n  public static Singleton getInstance() {
n if (instance == null) {
n     instance = new Singleton ();
n }
n return instance;
n  }
n  ...
n}