不应将泛型与原始类型一起使用. T表示应作为对象的类型参数.
更多参考
为什么Java泛型不支持原始类型? Java泛型? ，E和T有什么区别?
泛型限制

Generics are not supposed to be used with primitive types. T indicates a type parameter which should be an object.
More reference
Why don't Java Generics support primitive types? Java Generics ? , E and T what is the difference?
Restrictions on generics