你不能覆盖静态方法。
子类可以命名与超类相同的静态方法，但是 super 是一个非静态运算符。
你可以有多个方法执行两个不同的功能，但是它们需要不同的名字。

You cannot override an static method. A subclass may name a static method the same as that of the superclass, however super is a non-static operator. You could have multiple methods which perform two different functions, but they would need different names.