在java中的Switch语句中使用Integer类型

我在java中为我的Android应用程序编写了一些简单的代码，我得到了这些错误。

I was writing some simple code in java for my android app and i got these errors.

case表达式必须是常量表达式，而 private static final Integer 是常数

private static final Integer INVALID_USER = 901;
private static final Integer SENDING_FAILED = 902;
private static final  Integer OK = 903;
/*
 *
 *  And some more project related declaration...
 *
 */


        switch (responseCode){
            case INVALID_USER:

                    // logout
                    break;

            case SENDING_FAILED:

                    //resend request
                    break;

            case OK:
                    break;
        }

这是因为我使用了整数类型，然后我将类型更改为 int 并解决问题

This is because i used Integer Type, then i changed type to int and problem is solved

我的问题是为什么我们无法使用 Integer 作为案例表达式。 文档说交换机使用byte，short，char和int原始数据类型。它也适用于枚举类型（在枚举类型中讨论），String类，以及一些包含某些原始类型的特殊类：字符，字节，短整数和整数虽然变量是常量
我读过这个问题，但没有得到任何东西

My question is why we cant use Integer as a case expression. Docs says " A switch works with the byte, short, char, and int primitive data types. It also works with enumerated types (discussed in Enum Types), the String class, and a few special classes that wrap certain primitive types: Character, Byte, Short, and Integer" though variable is constant I read this question but didnt get any thing