枚举类型如Joshua Bloch的Effective Java所述 [英] Enum Types as explained in Effective Java by Joshua Bloch

问题描述

请参阅链接。关于枚举，布洛赫先生说

Please see this link. Regarding Enums, Mr. Bloch says

Java的枚举类型是通过public static为每个
枚举常量导出一个实例的类

Java’s enum types are classes that export one instance for each enumeration constant via a public static final field.

我阅读了 Enum Class文档，但是没有public static final field ，那么上述语句如何成立。请解释。
感谢

I read the Enum Class documentation but there was no public static final field, then how does the above statement hold true. Please explain. Thanks

推荐答案

创建一个 Test.java 写测试枚举：

public enum Test {
    Hello
}

编译此类： javac Test.java ，并使用 javap Test 获取编译的类：

compile this class: javac Test.java,and use javap Test to get the compiled class:

public final class Test extends java.lang.Enum{
    public static final Test Hello;
    public static Test[] values();
    public static Test valueOf(java.lang.String);
    static {};
}

，您可以看到 Test class从 Enum 中扩展，它有 public static final Hello 字段。

and you can see the Test class extends from Enum and it has the public static final Hello field.

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