enum-type的意思|示意

ENUM type columns are very fast and compact.

ENUM类型的字段非常的快捷和紧凑。

Avoid specifying a type for an enum.

避免对枚举指定类型。

An enumeration type (also named an enumeration or an enum) provides an efficient way to define a set of named integral constants that may be assigned to a variable.

枚举类型(也称为枚举)为定义一组可以赋给变量的命名整数常量提供了一种有效的方法。

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。

Here I've used the new keyword enum, given the enum a name, and specified the allowed values. Grade then becomes an enumerated type, which you can use in a manner shown in Listing 3.

在这里，我使用了新的关键字enum，为enum提供了一个名称，并指定了允许的值。

In order for the default value of an enum type to be easily available, the literal0 implicitly converts to any enum type. Thus, the following is permitted.

为了容易地利用枚举类型的默认值，0隐含地转化为任意的枚举类型。因此下面（注：的语句）允许的。