Java中的不可变类 [英] Immutable class in java

问题描述

我遵循所有Java标准，使我的班级变得一成不变

I made my class immutable by following all java standards

A. Defined class as final
B. declared all fields as private and final
C. No setter method
D. No method changes the state of object
E. declared all method as final
F. Safer/defencieve copying of collection/ non mutable object fields.

这些是我在定义不可变类时所做的主要检查点.

These are the priliminary checkpoints I made when desigining immutable class.

还有一个问题，我的对象仍然可以通过java反射进行修改，对吗? 还是我在课堂上错过了一点?

But one question left, my object can still be modified by java reflection, am I right? Or is there any point I missed in the class?

谢谢.

推荐答案

没有任何隐藏的东西-甚至不可变的类也不能幸免.但是，您对此无能为力，因此无法通过反射进行修改"不是不变性的标准之一.

There's no hiding from reflection - even immutable classes are not immune. There is nothing you can do about it, though, so "cannot be modified through reflection" is not one of the criteria of immutability.

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