如題,下方代碼兩處均用了泛型,<R>List<R>對應的應該是返回值的泛型,怎么可能會對傳入參數的泛型造成影響,求解答 public?class?fanx<R>?{ ????public?void?fanxx(R?dd){} ????public?<R>List<R>?getlist(R?i){ ????????List?l?=?new?ArrayList(); ????????l.add(1); ????????l.add("123"); ????????l.add(new?Object()); ????????return?l; ????} ????class?Box<T>?{ ????????private?T?data; ????????public?Box()?{?} ????????public?Box(T?data)?{ ????????????this.data?=?data; ????????} ????????public?T?getData()?{ ????????????return?data; ????????} ????} ????public?static?void?main(String[]?args)?{ ????????test.Box<String>?name?=?new?test.Box<String>("");//正常 ????????List?l2?=?new?fanx<String>().getlist(123);//正常 ????????List?l3?=?new?fanx<String>().getlist("123");//正常 ???????? ????????new?fanx<String>().fanxx(1);//傳入參數報錯 ????????new?fanx<String>().fanxx("1");//正常 ????} }