看完了多态的维基百科 http://en.wikipedia.org/wiki/Polymorphism_(computer_science) 在Parametric polymorphism一段里提到 “Parametric polymorphism is also available in several object-oriented languages, where it often goes under the name "generics" (for example, Java) or "templates" (C++ and D):” 我的理解就是多态的Parametric部分就包含了泛型?不是很肯定,不知道这个理解有没有问题?