Method fill

onjava/Suppliers.java:20–26

(C coll, Supplier<T> gen, int n)

  }
  // Fill an existing collection:
  public static <T, C extends Collection<T>>
  C fill(C coll, Supplier<T> gen, int n) {
    Stream.generate(gen)
      .limit(n)
      .forEach(coll::add);
    return coll;
  }
  // Use an unbound method reference to
  // produce a more general method:
  public static <H, A> H fill(H holder,