Question

如果我有一个等级类：

class Root {
    private String requestedField; // This is private, so Class<Root> is not the owner!
}

class RealOwner extends Root {
    public String requestedField; // This is visible from Class<Distant>

    RealOwner() { super(); }
}

class Middle extends RealOwner {
    Middle() { super(); }
}

class Distant extends Middle {
    Distant() { super(); }
}

现在，如果我有一个Class<Distant>，那么从requestField类中获取已声明Distant的类对象的正确方法是什么？

class Retriever {
    public static void main(String[] args) throws ReflectiveOperationException {
        Field field = Distant.class.getField("requestedField");
        Class<?> declaredBy = // Where did this field came from?
    }
}

Answer 1

调用getDeclaringClass()类的Field方法，找到定义字段的类。

如何发现哪个类声明了字段？

1 个答案: