类和接口名以大写字母开头，如Frame。
Class and interface names begin with a capital letter, as in Frame.
注意，这里的列名和表名是大写的。
Note that the column and table names are specified in uppercase here.
隐藏已知的文件类型的扩展名之后，结果是为全部大写的FBI。
After extensions for known file types were hidden, the result was an all-uppercase FBI.
类名应该总是以大写字母开头。
类名应该总是以大写字母开头。
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