可能的重复:Java:本地枚举
为什么我们不能在java中的特定方法中定义枚举?如果我有一个场景,我将在方法中使用这些枚举值,而不是在任何其他地方.在方法中声明而不是在全局定义它不是很好吗?我的意思是公开或默认.
Why do we cannot define enum within a specific method in java? If I have a scenario where I will be using those enum values in a method only not at any other place. Wouldn't it be nice to declare in method rather defining it at globally? i mean as public or default.
推荐答案您不能在方法级别定义 JavaDocs.(我希望看到一种允许这样做的语言)
You cannot define at the method level as stated by the JavaDocs. (I would like to see a language that allowed that)
嵌套的枚举类型是隐式静态的.允许将嵌套的枚举类型显式声明为静态.
Nested enum types are implicitly static. It is permissible to explicitly declare a nested enum type to be static.
这意味着无法定义本地(第 14.3 节)枚举,或在内部类(第 8.1.3 节)中定义枚举.
This implies that it is impossible to define a local (§14.3) enum, or to define an enum in an inner class (§8.1.3).
你可以做的事情是在类级别声明它并在方法级别声明一个变量:
What you can do it declare it at the class level and a variable at the method level:
public class Light { ... private LightSwitch position; private enum LightSwitch { On, Off } public void SwitchOn() { Switch(LightSwitch.On); } public void SwitchOff() { Switch(LightSwitch.Off); } private void Switch(LightSwitch pos) { position = pos; } }更多推荐
为什么 Java 不允许在方法中定义枚举?
发布评论