No enclosing instance of type SmsUtils is accessible. Must qualify the allocation with an enclosing

No enclosing instance of type SmsUtils is accessible. Must qualify the allocation with an enclosing instance of type SmsUtils (e.g. x.new A() where x is an instance of SmsUtils).

今天在写一个短信发送的工具类时使用到了内部类，在实例化内部类时遇到此错误。

SmsResult result = new SmsResult();

没有可以访问SmsUtils类型的封闭实例。必须使用封闭的SmsUtils类型的实例来限定分配（例如，x.new A（），其中x是SmsUtils的一个实例）。

SmsResult 是一个（非静态的）内部类。正在从静态上下文创建它。您需要提供一个Server实例作为外部实例。但是，几乎可以肯定我想让 SmsResult 成为一个静态的嵌套类，或者可能是一个外部类。

刚好今天看到一篇文章中提到：

今天面试我问你static关键字有哪些作用，如果你答出static修饰变量、修饰方法我会认为你合格，答出静态块，我会认为你不错，答出静态内部类我会认为你很好，答出静态导包我会对你很满意，因为能看出你非常热衷研究技术。

给 SmsResult 类的定义添加 static 关键字就ok了。

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