对于动态模组，一定会启用类别载入。

Class loading is always enabled for dynamic modules.

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如果您的类别包含静态栏位，请提供在类别载入时会将其初始化的静态建构函式。

If your class contains static fields, provide a static constructor that initializes them when the class is loaded.

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例如，在系统类别载入器类别空间中的类别，不应当指向孩子或子孙类别载入器的类别空间中的类别。

For instance, classes in the system class loader class space should not refer to classes in the class space of a child or a descendant class loader.

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