Java延迟加载枚举实例 [英] Java lazy loading of enum instances

问题描述

如果我在枚举类型中有一堆枚举实例，并且如果我第一次访问它的一个实例，那么所有其余的实例也将同时被初始化。有没有办法只有在第一次访问枚举实例时才能初始化枚举实例？

解决方案

code> enum 枚举是类。第一次使用类，它由JVM加载，所有的静态初始化都完成了。设置枚举成员是一个静态初始化，所以它们都将被初始化。

If I have a bunch of enum instances in an enum type, and if I access an instance of it the first time, all of its remaining instances too are initialized at the same time. Is there any way to initialize an enum instance only when it's accessed the first time?

解决方案

Not without basically making it not an enum anymore. Enums are classes. The first time a class is used, it gets loaded by the JVM and all of its static initialization is done. Setting up the enum members is a static initialization, so they're all going to be initialized.

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