问题描述
这可能是一个愚蠢的问题，但是我使用方法 enum.valueOf（String name）。没有问题，除了当我检查javadoc以了解更多关于这个方法，我找不到它。有 valueOf（Class< T> enumType，String name）的javadoc，但对于 enum.valueOf（String name）（这将表明一个具有此签名的方法不存在 - 但显然它是这样）。
This is probably a stupid question, but I'm using the method enum.valueOf(String name). No problem there, except that when I was checking the javadoc to find out more about this method, I couldn't find it. There is javadoc for valueOf(Class<T> enumType, String name) but none for enum.valueOf(String name) (which would suggest that a method with this signature doesn't exist - but clearly it does).
我在这里缺少一些东西，或者是在javadoc for API？
Am I missing something here, or is this an oversight in the javadoc for the API?
谢谢
推荐答案
没有方法Enum.valueOf（String）然而，每个枚举有一个 values（）和 valueOf字符串）由编译器生成的方法，并记录这些方法。它们是静态方法，因此不能在超类或接口中被覆盖或定义。
There is no method Enum.valueOf(String) However, every enum has a values() and valueOf(String) method generated by the compiler and these are documented. They are static methods and thus cannot be overridden or defined in a super class or interface.
Enum e = Enum.valueOf(""); // this doesn't compile
它在Java 5.0,6或7中是相同的。
Its the same in Java 5.0, 6 or 7.
对于Java 5.0 （搜索值）
对于Java 7 由@kapep提供
For Java 5.0 http://docs.oracle.com/javase/specs/jls/se5.0/html/classes.html#8.9 (search for values)For Java 7 http://docs.oracle.com/javase/specs/jls/se7/html/jls-8.html#jls-8.9.2 provided by @kapep
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