Java通过反射创建枚举实例

Question

I want to get an instance to an enum type, so that:

String enumString="abc";
MyClass.MyEnum enumType=Class.forName("com.MyClass.MyEnum."+enumString);

This gives me an inconvertible types.

Answer 1

Enum.valueOf will do it, but it is pretty picky about it's type. Make sure you cast the Class to Class<? extends Enum> Class<? extends Enum> . Example:

enum Foo {
    BLAT,
    BLARG
};

System.out.println(Enum.valueOf((Class<? extends Enum>)Class.forName("Foo"), "BLARG"));

Answer 2

看看Enum.valueOf（Class enumType，String name）。

Answer 3

You are looking for MyClass.MyEnum.valueOf(enumString) . No need to fully qualify the class in the string.