1·Type, structure, union, and enum definitions.
_ 类型、结构、联合体和枚举定义。
2·It shows up in the WSDL file as an enumeration element, and the value restrictions specified by your enum list in step 4 apply.
它在WSDL文件中显示为一个枚举元素，第4步中枚举列表所指定的值限制将应用。
3·It returns one of the FileVisitResult's enum values to tell the file visitor API what to do next.
它返回一个filevisitresult枚举值，来告诉文件访问程序api下一步做什么。
4·Tiger has conveniently added enum support to the good old switch statement, so it's easy-to-use and fits right in with what you already know. Listing 6 shows you how to pull this off
Tiger 能够很方便地把枚举支持添加到过去的好东西 switch 语句上，所以它很容易使用，而且适合您已知的内容。
5·This enum defines the various program elements that an annotation type can target. Listing 9 show the ElementType enum in its entirety.
这个枚举定义了注释类型可应用的不同程序元素。