是否可以从 Java 中的子类访问父类的私有方法？
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Is it possible to access a private method of parent class from the child class in Java?
提问by user1501127
How do I call a private method in this type of parent class? What I have done is an ugly peice of code but it works though I don't think it's a real solution.
如何在这种类型的父类中调用私有方法？我所做的是一段丑陋的代码，但它有效，尽管我认为这不是一个真正的解决方案。
Would really appreciate some advice on how this is done. I have looked to find solution but non that have given me some clarity on the matter.
真的很感激一些关于如何做到这一点的建议。我一直在寻找解决方案，但没有让我对此事有所了解。
public abstract class Car {
public void passItOn(int a) {
takesVariable(a);
}
private void takesVariable(int a) {
//Process the variables
}
the child:
孩子：
public abstract class Wheel extends Car {
boolean a = anotherMethod();
if(value() != a) {
passItOn(a);
}
}
There is some issue with my accaptance rate but I am on it! All will give + marks for replies!!!
我的接受率有一些问题，但我已经解决了！所有回复都会给+分！！！
回答by Kevin K
Accessing a private field/method is possible using reflectionif the security manager allows it, but strongly discouraged.
如果安全管理器允许，可以使用反射访问私有字段/方法，但强烈建议不要这样做。
Private methods are private for a reason. If you have access to the base class, making the method protectedis a far better solution.
私有方法是私有的是有原因的。如果您可以访问基类，那么制作方法protected是一个更好的解决方案。
回答by A--C
Private methods are not inherited, and so cannot be called. If you really want to have access to this method, change its access modifier keyword (protectedor public).
私有方法不会被继承，因此不能被调用。如果您确实想访问此方法，请更改其访问修饰符关键字（protected或public）。
回答by Aaron
Do this if you are fine with making it protected:
如果您可以对其进行保护，请执行以下操作：
public class BaseClass {
protected void whatever() {}
}
Or this if you want to keep it private for some reason, and it will also give your base class more control over how/when "whatever" is used:
或者，如果您出于某种原因想将其保密，并且它还将使您的基类更好地控制如何/何时使用“任何”：
public class BaseClass {
private void whatever() {}
protected void doWhatever() {
if(!forSomeReasonDoNotWantThisToBeUsed()) {
whatever();
}
}
}
回答by Salih Erikci
Make it protectedif you want to reach it from subclasses.
protected如果您想从子类访问它，请使用它。
回答by Amar
There is absolute no way this can be done. You cannot call a privatemethod of a class from any other class(be it the extending class). It can only be accessed inside that class itself. There is a reason it is said to be private.
绝对没有办法做到这一点。您不能private从任何其他类（无论是扩展类）调用类的方法。它只能在该类本身内部访问。据说是有原因的private。
If you want it to be accessed by only the extending classes an not the outside world then use protectedaccess modifier for your function.
如果您希望它只被扩展类访问，而不是外部世界，那么请protected为您的函数使用访问修饰符。
