Java为抽象类声明类？

Question

Does anyone know how to get the declaring / enclosing class of an abstract class in Java? In this case, I would like to get the anotherClass class from within someClass.

Example:

public class anotherClass extends someClass{
...
}

public abstract class someClass{
...
   this.getClass().getEnclosingClass();
}

Answer 1

没有反射就无法做到这一点

Answer 2

If you call this.getClass() in an abstract class it will still return the class of the actual implementation. In your case calling this.getClass() will return anotherClass , which is what you want if I am not wrong.

Answer 3

If you want to avoid the reflection solution, you can force people to pass you themselves with some curiously recurring generics, like the following:

class AnotherClass extends SomeClass<AnotherClass> {
    public AnotherClass() {
        super(AnotherClass.class);
    }
}

abstract class SomeClass<T extends SomeClass<T>> {
    final Class<T> enclosing;
    public SomeClass(Class<T> c) {
        enclosing = c;
    }
}