Class constants are always public, so you can't use the visibility keywords.

类常量始终为public，所以不能使用可见度关键字。

youdao

Because class names are constants, you can have only one class of a given name.

因为类名称是常量，所以您只能有一个给定名称的类。

youdao

The base class also defines some simple constants for the names of the tags.

基类还为标记的名称定义了一些简单的常量。

youdao