问题描述
我必须实现一个给定子类的逻辑，我需要访问它的父类和该父类的所有其他子类（如果有的话）。我没有在Java Reflection中找到任何允许我们访问父类的所有子类的API。有什么方法可以吗？
I have to implement a logic whereby given a child class, I need to access its parent class and all other child class of that parent class, if any. I did not find any API in Java Reflection which allows us to access all child classes of a parent class. Is there any way to do it?
例如：
class B extends class A
class C extends class A
现在使用B类，我可以通过调用 getSuperClass（）来查找超类。但有没有办法找到所有子类，一旦我有父类，即类B和类C ??
Now using class B, I can find the superclass by calling getSuperClass(). But is there any way to find all the child classes once I have the parent class i.e. class B and class C??
推荐答案
如果这不是家庭作业（可能不允许第三方图书馆），我建议'。
If this wasn't homework (where 3rd party librares are probably not allowed), I would have suggested Google Reflections' Reflections#getSubTypesOf().
Set<Class<? extends A>> subTypes = reflections.getSubTypesOf(A.class);
您可以自己扫描类路径，从，其中您传递作为名称。
You can do this less or more yourself by scanning the classpath yourself, starting with ClassLoader#getResources() wherein you pass "" as name.
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