Message in Chinese (Simplified) (中文(简体))
“<var>X</var>”并不扩展类“<var>Class Name</var>”,因此不是有效的基类。
Unlocalized message
'<var>X</var>' is not allowed here because it does not extend class '<var>Class Name</var>'.
Search by Google“<var>X</var>”并不扩展类“<var>Class Name</var>”,因此不是有效的基类。
'<var>X</var>' is not allowed here because it does not extend class '<var>Class Name</var>'.
Search by Google