Method Foo2

generics/FactoryConstraint.java:40–42

(Supplier<T> factory)

class Foo2<T> {
  private List<T> x = new ArrayList<>();
  Foo2(Supplier<T> factory) {
    Suppliers.fill(x, factory, 5);
  }
  @Override public String toString() {
    return x.toString();
  }