当我将其包含selenium.setSpeed("2000");在void main中时，出现语法错误“无法解析selenium”

当我将它放在我的void main之外和班级内部时，出现了错误：

"Multiple markers at this line - Syntax error on token ",", < expected - Syntax error, insert "SimpleName" to complete QualifiedName - Syntax error on token ".", @ expected after this token - Syntax error, insert ")" to complete MethodDeclaration - Syntax error, insert "Identifier (" to complete MethodHeaderName"

请帮助我解决此问题。