java 将类的静态变量重新初始化为其原始值java

re-initialize the static variables of a class to their original values java

提问by Peter Berg

I have a class that has a fair amount of static variables, not all of which are initialized to their default values (e.g. I have a boolean I initialize to true, a Set I initialize to a new Set(), etc.). This class is somewhat like a controller, that operates on other classes. After it's done operating on a class, I'd like to reinitialize all of its static variables to their original values using (if it exists) something that's a part of the java API, so that I don't have to make a "reinitializeClassVariables()" method with about a dozen variables in it that would need to be updated every time I make any changes to the static variables declared in the class. Any ideas?

我有一个类，它有相当数量的静态变量，并不是所有的都被初始化为它们的默认值（例如，我有一个布尔值我初始化为真，一个 Set 我初始化为一个新的 Set() 等）。这个类有点像一个控制器，它对其他类进行操作。在完成对类的操作后，我想使用（如果存在）作为 java API 一部分的东西将其所有静态变量重新初始化为其原始值，这样我就不必制作“reinitializeClassVariables ()" 方法，其中包含大约十二个变量，每次我对类中声明的静态变量进行任何更改时都需要更新这些变量。有任何想法吗？

采纳答案by PeterMmm

No, nothing build-in. You can do something with reflection or byte code manipulation, but it is not worth and makes all more complicated. Maybe you can refactor the static variables into a new class and then reset with a new instance "when done".

不，没有任何内置。你可以用反射或字节码操作来做一些事情，但它不值得，而且会使一切变得更加复杂。也许您可以将静态变量重构为一个新类，然后在“完成后”使用新实例重置。

回答by aioobe

After it's done operating on a class, I'd like to reinitialize all of its static variables to their original values

完成对类的操作后，我想将其所有静态变量重新初始化为其原始值

Seriously sounds like you would be better of with instancevariables. Then you could just create a new instance of your class (or a class containing your parameters) using new, and all variables would be initialized to their initial values. Something like this:

说真的，你最好使用实例变量。然后，您可以使用 来创建您的类（或包含您的参数的类）的新实例new，并且所有变量都将被初始化为其初始值。像这样的东西：

// All parameters (static if you so like)
static ControlParams controlParams = new ControlParams();

...

// Reset parameters
controlParams = new ControlParams();

something that's a part of the java API, so that I don't have to make a reinitializeClassVariables()

这是 java API 的一部分，这样我就不必制作 reinitializeClassVariables()

No, there's no such thing in the API (actually, it would have to be part of the language specification I believe). The use of static variables is simply a really bad choice in your use case.

不，API 中没有这样的东西（实际上，我认为它必须是语言规范的一部分）。在您的用例中，使用静态变量只是一个非常糟糕的选择。