类名可以包含字母、数字和下划线字符的任何组合，但不能以数字打头。

The class name can contain any combination of letters and Numbers, as well as the underscore character, but cannot begin with a number.

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单击browse并键入处理程序类名的前几个字母，然后从列表中选择该名称。

Click Browse and type the first few letters of the handler class name, then select it from the list.

youdao

提供了用于转换数值和字母数据的类。

Classes are available to convert both numeric and character data.

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