genericsに関する質問
Unsafe type operation: Should not invoke the method add(E) of raw type ArrayList.
References to generic type ArrayList<E> should be parameterized
ってどういう警告ですか?

こっちもお願いします。
Unsafe type operation: The method test(ArrayList<Test2>) in the type Test
should not be applied for the arguments (ArrayList). References to generic types should be
parameterized